This shop for all your super spy needs hides an educational secret.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Wine bottle sculpture with a ship's stateroom inside.

The longest living non-clonal organisms on Earth.

An encyclopedic collection of mammal penises.

A fascinating little museum dedicated to the thousands of chemical substances concealed in our food.

A monument to the art of slicing people open.

This golfball sized platinum iridium cylinder is the official starting point for all national weight calibrations

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A terrific purveyor of natural history objects and curios.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

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

Hot springs monkey spa in the middle of Hell's Valley.

A snapshot of the city's fascinating voodoo culture.

These fantastically named natural pools look like something out of a Scottish myth.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A kaleidoscopic warehouse-maze of handmade neon signs.

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

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A beautiful 62-acre Catholic shrine and botanical garden.