Eighty million natural history specimens call this gargantuan museum home.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

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

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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

A kaleidoscopic warehouse-maze of handmade neon signs.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This charming wooden church was disassembled and moved not once but twice before settling in this Prague garden.

A controversial artwork draws attention to the dark history of Prague's "Suicide Bridge."

A series of playful yellow penguins share a serious message about the environment.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

The hidden lair of an alchemist rediscovered in a 2002 flood.

An enormous and lavish Gothic church in Czechia.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

A church of bones, decorated with 40,000 human skeletons.

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

A massive, abstract lookout tower providing a panoramic view of Prague.

Looming communist pillar with a Czech twist.