Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

A subterranean shelter remains intact under a busy Paris railway station.

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

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

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

Abandoned railway line circling the city of Paris.

The famous artist couple lived and worked here, in two different houses separated by a bridge.

Frida Kahlo's childhood home, now a museum of her life and works.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

An unrealized Taoist palace left abandoned in a Houston suburb.

A little bit Wonkatania, a little bit pink elephant.

Beer lover's can-covered house.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

A health museum containing a 27’’½-foot intestine.

One man's homage to the orange as realized through a long-term folk art labor of love.

Hollowed out cedar log tubs set in an ancient towering forest.

A museum befitting the city responsible for supplying the majority of the world's LSD.

Hidden in the hills of Hollywood, this secluded Oz-themed garden is dotted with dozens of thrones.

A museum dedicated to the history and exploration of both popular music and science fiction.

The beautiful baroque library of the Hapsburg empire.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

The most visited, and possibly most controversial, museum in Germany.