At the time of its completion, it was the tallest dam in the world.

One man's ambition created this psychedelic log home.

The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

This canyon is named for a unique geologic formation where the river vanishes underground near the mouth of the canyon and reappears farther down.

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

This spectacular track has run continuously since 1882.

The hallowed remains of a 900-year old Ancestral Pueblo great house.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

This balancing rock is one of Utah's most unusual geological formations.

The location where the iconic movie character declared it was time to go home.

Most-visited and most-photographed slot canyon in the American Southwest.

This unique art installation used boiler tubes from a decommissioned power plant to resemble Antelope Canyon.

This Native American settlement dates back to the Pueblo II period.

This oversized flute-playing Ancestral Puebloan deity is also a landmark of Southwestern kitsch.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

An excursion train traverses a picturesque red-rock canyon along the Verde River.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

A spiritual vortex among the red rocks in Sedona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

This legendary urban waterfall creates a dazzling display of rainbows.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.