A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

A natural history wunderkammer in the middle of the desert.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

One of the world's largest telescopes, stares into the night sky with two huge mirrors.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

This golf ball–shaped former desert real estate office now houses a UFO museum.

Collection of vintage trailers double as hotel rooms.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

Ancient pueblos built into the base of a natural canyon wall.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

This historic national park is covered in the stunning ruins of red rock pueblos.

One of the largest, oldest, darkest, quietest motel rooms in the world.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

See massive fossils that are over 200 million years old in northeastern Arizona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Dramatic river bend surrounds a natural red-rocked pedestal.

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

11,500 year old little girl found buried in an ancient fire pit.

The stickered marker pinpoints where the only maintained road in the United States crosses into the polar region.

Buy your friend a drink or staple some cash to the wall for the next guy at the Salty Dawg Saloon.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.