BDSM, 1930s Style.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

A charming flea market shop dedicated to retrofuturistic apparati.

One of the oldest masonic museums in Paris.

The history of radiation is on safe display at the foot of a radiation science laboratory.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A haunting collection of the vanished and disappearing natural world.

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

Tour the sci-fi-esque reality of governmental disease management.

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

Australian Lake set aglow by Noctiluca Scintillans.

Pick up all of the cosmic knick-knacks under the sun or take a creative writing course, all offered in this novelty storefront.

A 20-meter (65-foot) robot towers over Tokyo Bay.

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

France's national museum of scientific and industrial instruments.

A fifth-century temple improbably built into the side of a cliff.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

This historical theme park celebrates all things noodle.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

A reproduction of earth's many biomes.

Less a museum than a bizarre fantasy world created by artists and engineers.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.