This small-town Connecticut restaurant gives each diner a free book from its vast library.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

Rock-cut cave complex filled with ancient Buddhist artwork.

Julia Buccola Petta's body was peculiarly well-preserved when it was exhumed six years after her death.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

A statue of the second-tallest Dutchman in history.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

It's good luck to be mocked by this monkey.

This little gem of Spanish Colonial architecture has been abandoned since the 1950s.

A small gallery and shop dedicated to an ancient style of hand-printed textile.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

This Funeral Hearse Museum represents the finest in cadaver transportation.

One of Europe's largest supercomputers is housed inside of a disused chapel.

Turntable anonymously received orphans, alms, and groceries.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

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

This cemetery features modernist statues as strange as its name.

A beautiful but toxic fountain of mercury.

This semi-secret storybook hedge maze is also the oldest garden in the city.

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

A palatial former bank building now houses what may be the poshest art venue (and former Tesco) in Belfast.