Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

This maintained cabin is where Josie Morris, an occasional associate of Butch Cassidy, lived out the last 50 years of her life by herself.

This pristine World War II airfield gives a comprehensive look at atomic development and aviation history.

Built at the turn of the 20th century, using bricks made and fired from clay found on the property.

These headstones and a few stone foundations are all that remain of a once-booming mining town.

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

Where a guard killed nine German prisoners during one of the worst 20th-century POW camp massacres in U.S. history.

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

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

Largest man-made excavation on earth!

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

A tunnel with windows, so you don't miss out on the impressive views.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

A sculpture for the sun and stars, created by Nancy Holt.

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

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

Enormous array of antennae fill a desert valley.

The Incas turned this ancient Wari aqueduct into an imposing defensive gate.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

An Archaeological Wonder of Peru, and the largest stone ruin site in the New World.

This stone complex marks the urban center of a lost civilization.