Garden dedicated to native carnivorous plants and site of huge flytrap heist.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

An eerie, decaying ghost town destined to fade into the forest.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Nikola Tesla's former home contains an homage hidden from plain sight.

These azure waters were thought to lead to the Mayan Underworld.

A storefront museum in Asbury Park honoring the Jersey Shore’s deep history of mystery—including the Jersey Devil.

The drama of nature in full effect in this Nevada State Park.

This mesmerizingly colorful pond looks like a scene straight out of a fairytale.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

World's oldest operating science fiction and fantasy club, once home to Ray Bradbury and L. Ron Hubbard.

A wunderkammer hidden on the top floor of the Hartford statehouse.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

Go through the looking glass in Tokyo's Wonderland-themed shop.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

Venice's "Island of the Mad."

Walk in the footsteps of the gods and straddle two tectonic plates.