A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

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

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

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

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

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

Notorious artist squat renovated into legal studios.

A 140-year-old castle with underground caves hidden in San Francisco.

Abandoned railway line circling the city of Paris.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

A giant Troll lurks under one of Seattle's oldest bridges.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

A bizarre house filled with an astounding array of collections.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This massive library holds what was once the largest book collection in the world.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.