A technicolor place of worship for Elevationists.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Three hundred years of preserved Spanish colonial history in San Antonio.

The Grand Canyon of Texas.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

A landscape of massive spherical boulders are the main attraction in this Kansas State Park.

This amazingly preserved Gold Rush town is a historian's dream.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

An entire town preserved as a historic landmark.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

Legends surround this jagged rock formation in the New Mexico desert.

A clear blue swimming hole with hidden caves, still unexplored.

The largest collection of historical roller skates in the world.

An experimental, automotive replica of Stonehenge.

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

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This nearly abandoned town was once a thriving mining community until a series of fires.

When ecosystems collide in the arid Southwest.

The largest self-built castle in the U.S., six decades in the making.