An incarceration museum on the spot of possibly the oldest prison in England.

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

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

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

One part local history, 99 parts gruesome haunted house.

The celebrated eyesore created by starry-eyed sweethearts.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Oldest Protestant church in the Middle East, designed to resemble a synagogue.

A "miracle" that seems to produce more holy fistfights than holy revelations.

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

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A 1970s resort city now stands abandoned, caught in the middle of a divided island.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This automated sculpture of two men peeing will spell out text messages with their micturition.

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

What looks like a suicide in progress is actually a statue of Sigmund Freud.

Monument to a suicide protesting the Soviet invasion.

A marvel of Byzantine engineering under the streets of Istanbul.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

The real life town from the Pied Piper of Hamelin has a mechanical puppet show that retells the famous story many times a day.

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

A sulfuric hellscape in southern Italy.