A hands-off space for graffiti artists to hone and display their skills.

This South London cemetery holds the remains of more than 15,000 people.

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

The anatomical-pathological collection of a man who changed surgery.

Hidden beneath the streets of London is a secret subway that only carried mail.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The largest of London's subterranean rivers and once a mad, bad center of London life.

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

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

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

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

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Central Europe's largest collection of mini-bottles is on display at this museum devoted to a bitter Hungarian liquor.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

A Hungarian optometrist's charming collection of Asian art and curiosities.

This hidden art nouveau gem was designed by an architect in search of a national style.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

Electrical curiosity museum housed in an old transformer station.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

A fake Transylvanian castle houses a cathedral of antlers.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.