Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

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

Immortalized by artists, this church incorporates a medieval lighthouse into its shoreside structure.

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

Largest lake in Great Britain measured by surface area.

One part local history, 99 parts gruesome haunted house.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

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

An underground city of salt.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

A Museum of Psychiatry in a still-operating mental institution.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.