An alchemist's "magic door" stands in the middle of a Roman park.

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

The very center of Paris is surrounded by a bevy of strange good luck rituals.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

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

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

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

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.