In the Shawnee National Forest, amazing rock formations peer through the treeline.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

This landmark is a central figure in the Nez Perce origin story.

Supposedly Satanic numbers adorn this preserved submarine sail.

A former gold rush boomtown has managed to stay in business for over 100 ramshackle years.

This museum glorifies the humble potato.

Home to the deepest rift anywhere on Earth.

A bizarre roadside attraction and the first instance of miniature golf in the world.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

One of few remaining antique carousels with stationary animals in the U.S.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

The largest source of fossilized insects anywhere.

See six states, pickled freaks, rocks, and antiques.

When ecosystems collide in the arid Southwest.

The highest bridge in America was built for an almost unnervingly small amount of money.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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

California's longest-running tourist attraction is a stump.

This massive statue of John Muir on the side of a California highway was carved from a redwood tree.

The world's first motel is now an administrative building for an apple farm.