Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

An architect's childhood fantasy treehouse made real.

These century-old beehive-shaped kilns were built to produce charcoal for nearby mines.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

A quirky old tree covered in tokens, cans, and bottles of wishes.

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Jurassic Park—A Still Life.

Despite his legacy of work in Spain, Cuba, and Florida, the larger-than-life writer's grave is a simple affair tucked in an Idaho cemetery.

This highest peak in Idaho can only be reached by traversing a formation known as "Chicken-Out Ridge."

Kay Andrews's recipe was so good, her family immortalized it in stone.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

A miraculous natural phenomenon known as "the spring that breathes."

This town is home to the world’s largest arch constructed entirely of elk antlers.

Home to the deepest rift anywhere on Earth.

Supposedly Satanic numbers adorn this preserved submarine sail.

Home to a timed geyser created by complete accident.

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.

This museum glorifies the humble potato.

A museum dedicated to the history and art of staying clean.

Special tunnels built so that frogs won't be killed when crossing the highway.