Explore some of the most unique vehicles in history along with a cast of unsettling mannequins.

An annual festival celebrating Colorado's most famous frozen corpse.

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

This super steep hike ascends 2,000 feet in less than a mile.

Colorado's only true geyser is hidden within the San Juan National Forest.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

This spectacular track has run continuously since 1882.

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

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Cave where bat-eating snakes hang down from the ceiling.

Enormous lake at the bottom of a unique cave system.

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

Mile-long cave system near Great Smoky Mountains.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

The only Florida state park with publicly accessible caves.

Enchanting cave with a river crashing through the roof.

One of the deepest blue holes in the world.

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