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

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Two stunning 17th-century libraries and a cabinet of curiosities.

A rare view of a preserved Victorian science museum.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

Banksy gives themself artistic license with this piece of London street art.

Started as a kitchen garden, now the second largest botanical garden in the world.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

Eighteen miniature death-scene dioramas.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A 16th-century horror show built in a lovely Italian garden.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

Where America's first doomsday cult awaited the end of the world.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

A beautiful Victorian-era cemetery, complete with a miniature village.

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

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

Abandoned railway line circling the city of Paris.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

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