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Alaska SeaLife Center - Seward, Alaska

Image: David Clode

Alaska truly is the last frontier. Its wildlife is as vast as its land, and its sealife is equally incredible. To get a closer look at many of these creatures, the Alaska SeaLife Center in Seward offers an excellent opportunity.

The only public aquarium in the state, the center combines regional exhibits with marine research, education, and wildlife rehabilitation. At this unique facility, visitors can observe regional birds in the aviary, view an undersea kelp forest, or watch seals and Steller sea lions at play in the Rocky Coast exhibit.

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National Aquarium - Baltimore

Image: naomi tamar

The National Aquarium in Baltimore is home to a wide range of exhibits, from an Amazon River forest to an Atlantic coral reef and more. Visitors can encounter an incredible array of creatures , enjoy interactive experiences , watch 4D films , and even participate in aquarium sleepovers .

Aside from its exhibitions, the National Aquarium's conservation work is geared toward combating climate change, protecting wildlife and their habitats, and reducing plastic pollution. Recent visitors have also raved about the dolphin show.

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Shedd Aquarium - Chicago

Image: Caroline Hernandez

The Shedd Aquarium in Chicago gives visitors an up-close view of a variety of aquatic animals, including jellyfish, seahorses, and giant Pacific octopuses. The aquarium offers animal encounter experiences with beluga whales, sharks, penguins, stingrays, and sea otters.

There are also plenty of exhibits to explore. Pacific white-sided dolphins, belugas, California sea lions, and sea otters can be observed from both underwater and above-water viewing areas. The Polar Play Zone allows children to learn about life at the North and South poles in a kid-sized submarine, feeling the texture of a starfish in the touch pool, and admiring the underwater viewing area.

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Tennessee Aquarium - Chattanooga, Tennessee

Image: Shane Rounce

The Tennessee Aquarium is divided into two separate buildings for freshwater and ocean exhibits , showcasing thousands of animals, including the macaroni penguin, sand tiger shark, alligator snapping turtle, hellbender, and giant Japanese spider crab.

The River Journey building features the Turtles of the World gallery, an Appalachian cove forest habitat, the River Giants exhibit, and more. In Ocean Journey , visitors will find a butterfly garden, a tropical cove habitat, and the Boneless Beauties exhibit, among other highlights.

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Seattle Aquarium - Seattle

Image: Craig Lovelidge

Aquatic life in Puget Sound can be witnessed through the Seattle Aquarium's one-of-a-kind, 360-degree Underwater Dome , which displays local fish in a 400,000-gallon habitat . Set on two historic piers, the aquarium educates visitors about Puget Sound and the ocean at large through exhibits, events, conservation and education programs, research activities, and more.

At the Family Activity Center, guests of all ages can participate in hands-on activities to learn about the majestic orcas of the Pacific Northwest. The aquarium's species recovery program works to save animals from extinction through research, field conservation, and more.

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Aquarium of the Pacific - Long Beach, California

Image: Julien Maculan

The Aquarium of the Pacific, in Long Beach, California, features habitats from the tropical Pacific Ocean, northern Pacific waters, and the Southern California/Baja region. As Southern California's largest aquarium, it houses more than 12,000 animals across 100-plus exhibits highlighting aquatic life in the Pacific Ocean.

The state-of-the-art Pacific Visions wing offers guests an interactive experience through film, art, and technology. Visitors can see what it's like to be an aquatic vet at the Molina Animal Care Center, and then learn about water sources and conservation at the Our Water Future exhibit.

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New England Aquarium - Boston

Image: David Clode

The New England Aquarium features an open-air exhibit space for seal and sea lion training, the four-story Giant Ocean Tank, an Indo-Pacific coral reef habitat, an exhibit spotlighting Atlantic harbor seals , and the Simons Theatre with its nearly five-story-tall movie screen.

Aside from the indoor and outdoor exhibits, the aquarium's research division conducts ocean exploration and conservation through a plethora of initiatives like saving sea turtles and protecting North Atlantic right whales.

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Shark Reef Aquarium - Las Vegas

Image: SGR

An aquarium is probably not the first thing that comes to one’s mind when thinking about Las Vegas, but the Shark Reef Aquarium is well worth a visit. With more than 2,000 animals, it features jellyfish, sharks, sea turtles, and even crocodiles.

Guests can feed stingrays, sea turtles, or even a zebra shark, or try out the Undersea Explorer VR Theater for an immersive digital experience.

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Aquarium of Niagara - Niagara Falls, New York

Image: Shaun Low

Visitors can find more than 120 animal species at the Aquarium of Niagara, including many rescues that are unable to survive in the wild. The Penguin Coast exhibit is home to a colony of 14 Humboldt penguins , and the aquarium showcases over 100 species of fish and invertebrates from both freshwater and saltwater ecosystems , as well as several species of seals and sea lions .

In the summer of 2024, the aquarium unveiled the Great Lakes 360 experience with an interactive sturgeon touch pool and 16 new exhibits highlighting animals from the Great Lakes and Niagara River ecosystems.

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Georgia Aquarium - Atlanta

Image: David Clode

At the enormous Georgia Aquarium, visitors can get close to rays, dolphins, sea lions, penguins, and sea otters, or even go behind the scenes at a dolphin training session. The aquarium focuses on conservation education and fostering positive connections between humans and animals.

The Ocean Voyager exhibit features a 100-foot-long underwater walk-through tunnel that displays more than 50 species.

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Gateway Arch’s time capsule

Image: Roger Miesfeld

The Gateway Arch, the 630-foot-tall monument located on the west bank of the Mississippi River in St. Louis, Missouri, is famous for being the world's tallest arch. But few people know about the secret hidden at its peak.

In 1965, before the final piece of the stainless steel arch was put in place, a time capsule containing the signatures of 762,000 St. Louis students and residents was welded into the keystone. Just one more fun fact added to the mystique of this midwestern icon!

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A celluloid treasure trove

Image: Denise Jans

Have you ever wondered where Hollywood's golden age films are preserved? Well, as it happens, they are not in the basement of some Tinseltown studio but more than 650 feet below the surface in a facility in Hutchinson, Kansas. Established in 1959, Underground Vaults & Storage specializes in storing a wide range of valuables, including paper documents and client records.

In addition, this site is a precious resource for the entertainment industry. Underground Vaults & Storage preserves—under optimal temperature and humidity conditions—film copies of classic cartoons, television programs like Friends , game shows, soap operas, and even the original reels of cinematic masterpieces like The Wizard of Oz and Gone with the Wind .

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A ‘Big Basket’ building

Image: Photo shot by Derek Jensen (Tysto, Public domain, via Wikimedia Commons

Who says a building has to look traditional to be iconic? Why settle for an ordinary office building when you can work inside a basket? That's what the executives of the Longaberger Company, an American manufacturer and distributor of handcrafted maple wood baskets, thought when they relocated to Newark, Ohio, in 1997.

Their headquarters was designed as a seven-story building, a perfect replica of the company's top-selling product, the Medium Market Basket. The massive handles are attached to the structure with copper and wooden rivets, and the gold-leaf-plated tags each weigh 725 pounds. Though the building was a novelty, the company eventually abandoned it, and it is now listed for sale.

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Empire State Building Wedding Club

Image: William Wachter

Popping the question on top of the Empire State Building has become a cherished tradition in the United States. Thousands of couples travel from all over the country to get engaged at one of New York City's most iconic buildings. But did you know that you can also celebrate a wedding there?

Every February 14, a few lucky couples are granted the unique opportunity to exchange wedding vows at the building's 86th Floor Observatory. Since 1994, hundreds of couples have said "I do" at this breathtaking location, celebrating Valentine's Day at America's most romantic landmark.

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A supernatural castle

Image: Michelle_Raponi

Creativity, ingenuity, and perseverance can achieve extraordinary feats. Such is the case with Coral Castle, a massive limestone structure built by self-taught engineer Edward Leedskalnin in the early 20th century.

Located just north of Homestead, Florida, sits this construction built with stones larger than those at Stonehenge. Leedskalnin, who invested more than 28 years in this project, claimed that he raised it single-handedly using reverse magnetism and supernatural abilities. The truth is he probably used pulleys and other tools, but that doesn’t make it any less of a unique and original building that is a fascinating tourist attraction to this day.

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Walt Disney's utopian city

Image: Paul Moody

Walt Disney was a visionary, and thanks to his infinite imagination today we have the most endearing characters and the best amusement parks in the world. But did you know that Disney originally envisioned his famous EPCOT Center as the blueprint for a larger utopian society?

EPCOT stands for Experimental Prototype Community of Tomorrow. Had Disney’s dream come to fruition, 20,000 people could have lived in a real, futuristic city complete with residential areas, shopping malls, factories, recreational parks, and a state-of-the-art multimodal road system to connect it all. Unfortunately, after his death in 1966, the company felt his original vision was a bit impractical. Instead, they created a theme park that captures the spirit of its creator, a permanent celebration of human achievement, from culture to technological innovation.

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Secret codes

Image: Pixabay

The CIA is a mysterious organization, so it's no wonder that there is a sculpture hiding secrets sitting right in the courtyard of the George Bush Center for Intelligence in Langley, Virginia.

Named "Kryptos," this large copper sculpture was installed in 1990 and holds a series of four encrypted messages. Only three of these codes have been cracked, while the fourth remains one of the most famous unsolved cryptograms in the world.

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The paper house

Image: Daderot, Public domain, via Wikimedia Commons

It seems that the 1920s was a time of inventiveness, innovation, and originality in architecture. During this decade, the United States built the most impressive skyscrapers and, as we've explored, even a massive limestone castle. But a house made of paper? It seems almost impossible, doesn’t it?

Well, we are about to prove you wrong. In 1924, a mechanical engineer called Elis Fritiof Stenman built a summer cottage made almost entirely out of pasted, coated, or rolled-up newspapers. The only exceptions were the framework, floorboards, and shingles. The house is located in Rockport, Massachusetts, and, believe it or not, is still standing and can be visited.

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Race into the sky

Image: roberto_bellasio

The Chrysler Building on the East Side of Manhattan in New York City was once the world’s tallest building, holding the title for 11 months. But did you know that it almost didn't make it? Industrial pioneer Walter Chrysler, who commissioned the project, wanted his building to be taller than the Eiffel Tower. Originally designed to be 925 feet tall , the imminent construction of other taller skyscrapers forced architect William Van Alen to revise his plans.

This competition for the title of the world’s tallest building became known as the " Race into the Sky ." To beat his opponents, Van Alen ordered a 125-foot spire to be built in secret. It would only be attached to the roof after the rival buildings were finalized. When it was finished in May 1930, the Chrysler Building reached 1,046 feet, making it the tallest man-made structure in the world at the time. Unfortunately, less than a year later, the Empire State Building would claim that honor.

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A laboratory under the sea

Image: NEOM

Did you know the world's only undersea research laboratory is located in the United States? Sixty-six feet below the surface of the ocean off the coast of Florida lies Aquarius Reef Base, an underwater lab where researchers work for up to ten days at a time.

Aquarius is dedicated to the study and preservation of coral reefs, fish, and aquatic plants. The facility is currently operated by Florida International University and contains sophisticated state-of-the-art lab equipment.

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Give me the time of day

Image: Leo_Visions

A bridge that tells time? We are not kidding! When it’s not being used by pedestrians and cyclists to cross the Sacramento River in Redding, California, the Sundial Bridge at Turtle Bay serves as a giant timepiece.

The bridge's 217-foot support tower points north, and its shadow can be used to calculate the time. Designed by renowned Spanish architect Santiago Calatrava, it was completed in 2004. So now you know, if your watch breaks or your cell phone dies on your way to Turtle Bay Exploration Park, you don't have to worry, the Sundial Bridge will always tell you the time of day!

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The Capitol Subway System

Image: Harrison Haines

Few people know that a network of subway cars runs beneath Washington’s labyrinthine Congressional headquarters. The first Capitol Subway System opened on March 7, 1909, and has been transporting politicians seeking shelter from the weather—and curious onlookers—for more than a century.

The rails stretch for nearly a mile, connecting the United States Capitol to several congressional office buildings. While the public can ride the trains, the subway is restricted to congressional members and staff during votes.

1

Roswell Incident (New Mexico, 1947)

It was July 1947 when something extraordinary happened near Roswell, New Mexico: a mysterious, large object crashed on a ranch outside the town. It wasn't an airplane, it wasn't a helicopter, it didn't resemble any known aircraft at the time. Interestingly, the military first described it as a "flying disc," only to later retract the statement and claim it was just a weather balloon. This shift caused endless theories and made Roswell perhaps the most famous UFO story of all time.

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Kenneth Arnold Sighting (Washington, 1947)

No one knows the skies better than pilots, and in June 1947, one of them, Kenneth Arnold, saw something that would change the way we think about extraterrestrial life. According to his report, Arnold spotted nine bright objects moving near Mount Rainier, Washington. He described their flight as being like "a saucer skipping across water." That phrase would go on to coin the term "flying saucer," marking what many consider the beginning of the modern UFO era.

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Washington, DC, Flap (1952)

Do you think UFO sightings only happen in rural or remote areas? Between July 12 and 29, 1952, something unexplainable occurred over Washington, DC. People in the US capital reported seeing mysterious objects moving randomly in the sky. But that wasn't all; pilots and even radar stations reported the same. While the US Air Force suggested that temperature might have affected radar performance, the sightings were never fully and clearly explained.

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Kelly-Hopkinsville Encounter (Kentucky, 1955)

On August 21, 1955, two families in rural Kelly, Kentucky, experienced something straight out of their wildest nightmares. In the evening, a bright, fleeting light appeared in the sky. According to their reports to the police, the light was followed by the arrival of small creatures with large eyes and long arms, described as "little green men," who allegedly approached their homes and peered through the windows. Terrified, the families shot at them for nearly four hours, until the "little green men" finally seemed to disappear. When police arrived the next day, the houses were empty. According to neighbors, both families had packed up and left, saying the creatures had returned around 3 a.m.

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Kecksburg UFO Incident (Pennsylvania, 1965)

We all know what to do when we see a shooting star: make a wish! But that was far from the reaction in Kecksburg, Pennsylvania, where on December 9, 1965, residents watched what looked like a massive fireball streak across the night sky before crashing into a forest on the town’s outskirts. Some people rushed to the site and claimed they saw a large metallic object shaped like an acorn. The military arrived soon after and launched an investigation that suggested it may have been a meteor or space debris. But the doubters were not convinced, and the event sparked a wave of theories and speculation that continues to this day.

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Coyne Helicopter Incident (Ohio, 1973)

On October 18, 1973, near Mansfield, Ohio, something occurred that would challenge even the most stubborn skeptics. Captain Lawrence Coyne was piloting a US Army Reserve helicopter when it was allegedly intercepted by a large, cigar-shaped craft flying erratically at high speed and emitting green and red lights. During the encounter, the helicopter suddenly ascended beyond Coyne’s control. People on the ground witnessed the event and later confirmed parts of the pilot’s account. To this day, the incident remains unexplained.

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Cash–Landrum Incident (Texas, 1980)

The ’80s were a wild decade, and that even included alleged encounters with alien spacecraft! In December 1980, three people reported a terrifying experience while driving through Texas: they were suddenly forced to stop when a huge craft hovered over the highway. According to their account, the metallic object emitted bright lights and intense heat. Later, all three developed physical symptoms, including burns, nausea, vomiting, and hair loss. Medical reports suggested these effects were consistent with prolonged radiation exposure, although it could not be proven that the incident itself caused the symptoms.

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Hudson Valley UFO Wave (New York, 1982-1986)

An isolated UFO sighting involving just a few people is one thing. But it’s quite another when, for years, hundreds of people report sightings in the same place with similar characteristics. We’re talking about New York’s Hudson Valley, where for several years (1982–1986), residents, police officers, and even pilots reported UFO sightings. Many described the same thing: a large craft with a V-shaped row of lights that moved strangely and flew very low, sometimes even approaching houses. While some skeptics claimed they were planes flying in formation, witnesses didn’t fully accept this explanation.

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Phoenix Lights (Arizona, 1997)

If one person’s sighting seems hard to believe, maybe the testimony of thousands will convince you. In March 1997, one of the most famous UFO events witnessed by large groups occurred. Thousands of people reported seeing the same phenomenon in the skies over Arizona, Nevada, and Mexico: a formation of lights moving silently and strangely across the night sky. Even Fife Symington, the then-governor of Arizona, later claimed he had seen the lights himself.

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O'Hare Airport Sighting (Illinois, 2006)

If your skepticism has lasted this long, the next story might make you rethink everything. In November 2006, a large group of pilots, mechanics, and airline staff spotted a metallic, disc-shaped object hovering above United Airlines Gate C17 at O’Hare International Airport just outside Chicago. Witnesses say the object punched a circular hole in the clouds before shooting off. The FAA (Federal Aviation Administration) initially called it a "meteorological phenomenon," but later-released ATC audio reveals tower and ground staff discussing the object in total confusion.