An unoccupied lighthouse encased in layers of ice from the waters of Lake Erie.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

Opulent downtown movie theater now houses cars as an indoor parking garage.

This Detroit ruin was once a gothic bastion of its community, but now it stands as a haunting ruin.

Abandoned concert venue legendary for its rock counterculture.

The world's oldest operating jazz club has been in operation since May 1934.

This freshwater spring fills with 10,000 gallons of water per minute.

Astounding collection of coin-operated games and automata.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

Legs Inn provides Polish food, a cornucopia of Native American artwork, wood carvings, and mounted deer heads.

Part taxidermy workshop, part natural history museum this Michigan destination shows off its dead animals and helps you mount your own.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

The glowing blue Nymphaeum of Emperor Tiberius.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

A spectacular cave and a beguiling lake.

The hallucinogenic center of the ancient world.

"The most colorful grottoes of the world.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

A surreal museum of extraordinary industrial objects.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.