1

Grand Prismatic Spring

Image: MikeGoad

The steaming, multicolored circle of the Grand Prismatic Spring is one of the most hypnotic and unique sights in the U.S. Part of Yellowstone National Park, this hot spring is the largest in the country and the third-largest in the world, measuring 370 feet wide and 160 feet deep.

Its vibrant colors, ranging from deep blue in the center to fiery red and orange at its edges, are unlike anything we see in nature every day. Minerals and microbes are responsible for these hues, with water temperature causing the pigments to fluctuate . The spring owes its existence to geothermal activity driven by Yellowstone's underlying magma chamber and is located in the Midway Geyser Basin.

2

Fly Ranch Geyser

Image: Ken Lund, CC BY-SA 2.0

One of the reasons why Fly Ranch Geyser is unique in the world is that it was formed after a human accident . This technicolor geothermal geyser, located on the Fly Ranch property in the Hualapai Geothermal Flats of Washoe County, Nevada, wasn’t there before 1916.

In 1916, while drilling a well for irrigation in the area, workers struck near-boiling geothermal water, leading to the creation of the first geyser. Decades later, in 1964, a geothermal energy company drilled a second well nearby, which caused the emergence of the Fly Geyser we know today. It has been spouting water into the sky ever since, forming several cone-like vents atop a mound that continues to grow.

3

Devil’s Kettle

Image: chrishawaii

Where does the water from the Brule River go when it falls? For a long time, this was a mystery. Located in Judge C.R. Magney State Park near Grand Marais, Minnesota, along the North Shore of Lake Superior, the river is famous for its unusual split: one half flows downstream, while the other plunges into a seemingly bottomless hole .

This waterfall has baffled visitors and scientists for years because objects thrown into the "kettle," such as logs and ping-pong balls, appeared to vanish without resurfacing. This fueled theories of underground rivers or deep caverns beneath the falls. The mystery was solved recently when hydrologists discovered that the water entering the kettle resurfaces downstream . The kettle's strong currents explain why objects thrown in don’t resurface; they are broken apart and held underwater, functioning like a natural washing machine.

4

Mono Lake Tufa Towers

Image: Stephen Leonardi

These unique limestone formations, known as the Mono Lake Tufa Towers, emerge from the salty, alkaline waters of Mono Lake , fed by underwater springs. Located in eastern California, near the Sierra Nevada mountains and about 13 miles east of Yosemite National Park, they are a striking natural wonder.

These tufa towers rise dramatically from the water. How were they formed? Mono Lake has no outlet, so its high alkalinity and salinity caused minerals to accumulate over time. This unique environment supports an ecosystem of brine shrimp, alkali flies, and migratory birds. To give you an idea, the lake’s salinity is more than twice that of the ocean, which means you could float effortlessly in its waters, as many visitors do.

5

Crater of Diamonds

Image: Brett Sayles

If you find a diamond here, you get to keep it—this is the only diamond-bearing site in the world where that's possible. Open to the public for mining , the Crater of Diamonds is a 37.5-acre field located near Murfreesboro, Arkansas. It marks the eroded surface of a volcanic pipe composed of lamproite, a rare volcanic rock.

Visitors sometimes find diamonds of various colors, including white, yellow, and brown, along with other gems like amethyst and garnet. It was here that the "Uncle Sam Diamond" was found, the largest diamond ever dug out in North America, weighing 40.23 carats. Diamonds were first discovered here in 1906 when a local farmer found unusual crystals on his land, which sparked a minor diamond rush.

6

Antelope Canyon

Image: Roberto Lee Cortes

Rocks that look like flowing water: Antelope Canyon is a famous and breathtaking slot canyon in northern Arizona. It consists of two main sections: Upper Antelope Canyon (a.k.a. Tsé bighánílíní, or "the place where water runs through rocks") and Lower Antelope Canyon ( Hazdistazí, or "spiral rock arches").

The canyon was formed over millions of years as flash floods and desert winds eroded the Navajo Sandstone. Even today, seasonal flash flooding continues to shape and carve the canyon’s mesmerizing features. Its surreal, wave-like formations in shades of orange are a favorite subject for photographers and tourists from all over the world.

7

Petrified Forest

Image: Megan Clark

The Petrified Forest National Park in northeastern Arizona boasts one of the world's largest and most vibrant concentrations of petrified wood . The park, part of the Painted Desert, is located between the Apache and Navajo Counties.

Most of the wood found there is from ancient conifer trees that date back about 225 million years to the Late Triassic period. These trees were swept into river systems, buried by sediment, and transformed into stone through a process called permineralization . The park also features a wealth of fossilized remains of ancient animals, including early reptiles.

8

Devils Tower

Image: Kyle Petzer

The Devils Tower stands alone, protruding dramatically from the plains. Considered sacred by Native American tribes, it was originally called "bad god’s tower," a name that eventually evolved into its current form. Located in northeastern Wyoming, this igneous rock monolith soars 867 feet above its base.

It was designated the first U.S. National Monument by President Theodore Roosevelt in 1906. Geologists agree that Devils Tower was formed through the intrusion of magma into sedimentary rock layers about 50 to 60 million years ago. Today, climbers from around the world are drawn to its sheer walls, though climbing is prohibited in June to honor Native ceremonies.

9

The Wave

Image: Mark Nemenzo

The Wave is a visually stunning sandstone formation located in the Coyote Buttes North area of the Vermilion Cliffs National Monument. Known for its hypnotic, swirling bands of red, orange, and yellow, its delicate ridges are so easily damaged that even one misplaced footstep could ruin the beautiful patterns.

Approximately 185 million years ago, this area was a vast desert covered in dunes. Over time, layers of sand were deposited, compacted, and cemented, forming this Navajo sandstone shape. Unfortunately, The Wave is only accessible by a challenging hike that requires a permit, due to the fragility of its ecosystem and high demand from visitors. With less than 5% of applicants obtaining a permit each year, it is one of the most exclusive hiking destinations in the world.

10

Kasha-Katuwe Tent Rocks National Monument

Image: Bruce Warrington

The Kasha-Katuwe Tent Rocks National Monument, located in northern New Mexico, displays a unique landscape of tall, cone-shaped rock formations. These "tent rocks," composed of pumice and tuff, are known as "hoodoos." They are natural formations ranging from a few feet to approximately 90 feet tall.

The name "Kasha-Katuwe" means "white cliffs" in the Keresan language of the Cochiti Pueblo. Hiking trails, such as the Slot Canyon Trail, offer visitors the opportunity to explore the cones up close while walking through dramatic, narrow canyons.

1

Smart boy

Image: Benjamin Smith

It's definitely not a secret that Albert Einstein was an exceptionally intelligent child. However, his achievements were extraordinary, and we're not just talking about him getting A's in school; he was teaching himself complex subjects as a preteen just for fun!

At just 12 years of age, his curious and powerful mind led him to become an autodidact. While other children were naturally playing on the playground, Einstein taught himself algebra and geometry in a single summer!

2

Scientific teen

Image: Camille Orgel

That genius child became a teenage scientist. At 16 years old, most of us were dealing with high school, but Einstein was doing something a bit different: he was writing his first scientific paper, titled "On the Investigation of the State of the Ether in a Magnetic Field."

The paper was inspired by his compass and examined the force of magnetism. Although it wasn't published, this research reveals the passion, dedication, and great intellect that Einstein displayed from a very young age.

3

A hobby

Image: Providence Doucet

But calculus and science weren't the only interests of the young Einstein. One of his other great passions was music. And, of course, he stood out in that field too.

It turns out that his mother, Pauline, was a talented pianist, and she encouraged Albert to play music from an early age. At 5 years old, Albert received a violin as a gift and began his lessons immediately.

It's said that, at first, he struggled a bit due to the instrument's complexity—yes, probably because he was only 5—but by the age of 13, he had become a skilled violinist, playing compositions by classical composers such as Bach and Mozart.

4

First job

Image: Andrew George

Einstein graduated from the Polytechnic Institute in Zurich in 1902 at the age of 23. Surprisingly, despite his impressive intellectual ability and broad knowledge, he was rejected for many of the academic positions he applied for after graduation. Faced with this situation, the scientist accepted a job at the Swiss Patent Office in Bern.

Later, Einstein stated that taking that job was "a salvation," as it provided a stable income and, at the same time, gave him free time to commit to his ongoing scientific research fully. Thanks to this key decision, by 1909, Einstein had already become a renowned scientist, celebrated for his contributions to physics.

5

Another passion

Image: Ian Keefe

With such a wonderful mind, it's no surprise that Einstein would have multiple and varied passions and hobbies.

One of those was sailing. Although he developed this interest as an adult, he was still very young when he discovered that sailing had a calming effect on him.

Sailing became one of his favorite activities, allowing him to escape the intensity of his work and appreciate nature—and his relationship with it—from a different perspective. He would often spend entire days on lakes and rivers, both during his time in Europe and later in the United States.

6

Almost a president

Image: Kate Macate

Among Einstein's varied accomplishments, there is one that many people don't know about: he almost became a president!

In 1952, the genius received a formal invitation from Israel to become the country's president. By that time, Albert was already a recognized and respected physicist, making him an ideal figure for that leadership role. However, Einstein politely declined the offer, claiming that he didn't have the political experience needed for the position and that his desire was to continue working in the scientific field. Once again, his wisdom stood out.

7

100 against him

Image: Igor Omilaev

Standing out in a field and introducing new ideas can often turn many against you. That "hate" we see today on social media isn't something entirely new. Some public figures had to deal with hate long before the internet became part of our daily lives.

Something like that happened to Einstein. As is well known, the publication of his Theory of Relativity brought a lot of uproar, both positive and negative. In 1931, a group of scientists published a collection of essays called One Hundred Authors Against Einstein (a bit aggressive, right?), in which they opposed the new ideas and discoveries of the German scientist.

8

Gossip

Image: Jarvik Joshi

The 20th century had something for everyone. In the 1950s , while Einstein was immersed in his theoretical physics work, Hollywood was at one of its peaks, with stars like Audrey Hepburn, Elizabeth Taylor, Grace Kelly, and Marilyn Monroe gracing the screen. While it may seem that science and entertainment are separate realms, rumors and gossip brought these two worlds together.

Legend has it that our well-remembered scientist had a brief romantic affair with none other than Marilyn Monroe, one of the most talented and beautiful women the world has ever seen. Although it's true that both figures met at several public events in the United States, there's not enough evidence to support this rumor.

9

The marriage

Image: Marc A. Sporys

There is a romance involving Einstein that was somewhat controversial but definitely confirmed. We're talking about his second marriage.

Einstein was married twice in his life. In 1903, he tied the knot with Mileva Marić, his colleague at the Polytechnic Institute in Zurich, Switzerland. Just like him, she was also noted for her brilliance. After 16 years, the marriage began to weaken, and the couple divorced in 1919.

That same year, Einstein married for the second time, this time to his first cousin , Elsa Löwenthal. The marriage was controversial due to their familial connection, but the union lasted for 17 years, until Elsa's death in 1936.

10

Free ankles

Image: Mockup Graphics

We all have our fashion quirks, right? Some hate turtlenecks, others choose the quality of their shirts carefully, and others may pay attention to details like accessories.

It turns out that Albert Einstein also had a little quirk when it came to clothing, but it's probably not what you're expecting. In fact, Einstein didn’t pay much attention to clothes or fashion. However, there was one particular item he found totally annoying and useless: socks . It’s said that he often wore mismatched socks for several days in a row, and at one point, he simply stopped wearing socks altogether.

1

Olympic National Park

Image: Georg Eiermann

Let’s kick off our ranking with Olympic National Park, located in the state of Washington. The park was designated as a National Park in 1938 during Franklin Roosevelt's presidency.

What makes this National Park so remarkable? Well, it has three distinct ecosystems : the temperate rainforest (which is the only one in the contiguous United States), the rugged coastline, and glaciated peaks. This variety of landscapes brings a rich biodiversity to the area that is definitely worth visiting!

2

Joshua Tree National Park

Image: James Lee

We know it’s in the name, but did you know Joshua Trees aren’t actually trees ? They belong to a subgroup within the yucca species. These plants can live for over 150 years, and you can find them in this park, among other places.

Similar to Olympic National Park, this park features three separate ecosystems: a part is within the Colorado Desert, it also includes California juniper, the San Bernardino Mountains, and the Mojave Desert where you’ll find the famous Joshua trees.

If that wasn’t enough reason to pay a visit, you have to know that this park has one of the darkest skies in Southern California, providing an excellent opportunity to spot the Milky Way galaxy!

3

Grand Teton National Park

Image: Michael Kirsh

Located in Wyoming, this National Park is home to what is believed to be the youngest mountain range in the Rocky Mountains: they are only between six and nine million years old!

In Grand Teton, you’ll find incredibly tall mountain peaks (the highest reaching 13,770 feet) and a wide variety of wildlife, including grizzly bears, gray wolves, coyotes, moose, and more.

Established in 1929, the park was later combined with the Jackson Hole National Monument, in 1943. Today, the town of Jackson Hole, located to the south of Grand Teton is the main hub of activity in the area. And, if you visit, you can actually make it a two-for-one trip because it's only 10 miles away from Yellowstone National Park, which will be featured later in this list!

4

Acadia National Park

Image: Raphael Assouline

Acadia National Park receives over 3.5 million visitors each year, and that has secured a position in this ranking. The park features granite mountains, rocky coastlines, ponds, lakes, and all kinds of plants and wildlife. It is an Atlantic shoreline beauty!

The park was first named Sieur de Monts National Monument by President Wilson in 1916. In 1919, it was renamed Lafayette National Park, but that wasn’t the end of it. In 1929, the name officially changed to Acadia National Park, honoring "Arcadia," a region in Greece that is pretty similar to the park!

5

Yosemite National Park

Image: Jota Lao

Although it is not one of the top three most visited national parks in our country, the park’s popularity is undeniable because it was the one park that paved the way for the National Park System as we know it today. The establishment of this area as a national park is largely credited to John Muir, a Scottish naturalist who recorded the beauty of the area and raised awareness around it.

Today, Yosemite covers an area of 759,600 acres and is home to granite cliffs, giant sequoias, mountains, glaciers, streams, and waterfalls. It is predominantly classified as wilderness and is, of course, a protected area.

6

Rocky Mountain National Park

Image: Lauren Lopes

This national park is a gem in Colorado and the 4.5 million visitors it receives each year is a testament to that. The park boasts rugged mountain terrain, alpine lakes, and dense forests—making it simply breathtaking.

It was established in 1915, and it is home to Longs Peak , which stands at an impressive 14,259 feet, and the famous Trail Ridge Road, the highest paved road in the country! Besides, this park is home to over a thousand types of wildflowers and 280 species of birds, just to mention a few details that make it an incredible place in America!

7

Yellowstone National Park

Image: Nicolasintravel

Yellowstone National Park is a true icon of the American West, and with over 4 million visitors each year, it’s easy to see why. The park lies across Wyoming, Montana, and Idaho, and it showcases wilderness at its best: geysers, hot springs, rivers, and canyons co-exist within the area. It is also home to the famous Old Faithful , the visitor’s favorite: an ever-erupting geyser!

Yellowstone holds the honor of being the very first national park in the world, having been established in 1872. The idea of preserving this vast and unique landscape for future generations was revolutionary at the time, and it laid the groundwork for the global national park movement. Have you had the chance to visit it yet?

8

Zion National Park

Image: Jamie Hagan

This deserted wonderland is located in Utah and it is known for the towering red sandstone cliffs and deep canyons as well as the glowy rock formations .

Established in 1919, it was Utah’s first National Park, and it is home to over 100 miles of trails. Car access to the park is limited, so there are plenty of hiking trails within the area. Moreover, this park is home to the second largest freestanding arch in the world which is 287 feet in length.

If you visit the park, you will surely make a stop at the Zion Lodge. But, did you know this is not the original construction? The original structure was struck by a fire in 1960, so the one you see today is actually a second version of it!

9

Grand Canyon National Park

Image: Michael Kirsh

You probably thought this was the most visited park in our country, but there’s another that holds that title! As for the Grand Canyon, it still is incredibly popular, and receives over 6 million visitors every year!

Located in Arizona, the Grand Canyon stretches 277 miles long and a mile deep. It was established in 1919 and it is only second in the ranking due to the powerful and awe-inspiring sights. That’s why it is one of the Seven Natural Wonders of the World .

Across the canyon, visitors can enjoy the Colorado River, where water carves layers of rock that have been in the area for millions of years. No words can capture its beauty, you just have to visit it to understand it.

10

Great Smoky Mountains

Image: Micah Williams

To close our ranking, we present the most visited National Park in America: the Great Smoky Mountains. Did you guess it right? Even if you did, you would have never guessed the number of visitors right: a shocking 13 million visitors a year ! Now, the reasons? Almost as many as its visitors.

The National Park was established in 1934, but the mountains that are housed in it were formed millions of years ago. It spans the borders between North Carolina and Tennessee and it is best known for its mist-covered mountains, lush forests, and the remarkable biodiversity of plants and animals.

With 800 miles of hiking trails, among which you’ll find the Appalachian Trail, preserved historic buildings, and peaceful retreats, it’s no surprise that the number one park on our list is also a favorite among visitors. Do you agree?