An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

Copenhagen's celebrated theme park and gardens.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

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

Its buzzing collection honors vibrator history.

Olfactory delights in San Francisco's Botanical Gardens.

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

An abandoned swimming pool decays on the outskirts of Berlin.

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

An old tram depot transformed into a vintage car paradise.

This curious sculpture represents the perseverance needed to take to the skies.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

A restaurant and observation deck built in a unique broadcasting antenna.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

A fascinating insight into daily life in the Eastern Bloc.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

A surreal museum of extraordinary industrial objects.

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

A marine aquarium with an astounding variety of fish hides in the basement beneath the famous Palm House.

A comic book store that puts the marvel back in marvellous.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.