Once the tallest building in the world and the site of “the highest dinner ever held in New York” this building now holds the most expensive penthouse in the city.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

France's national museum of scientific and industrial instruments.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Climb inside an iron crystal magnified 165 billion times its normal size.

A once-luxurious, now abandoned hotel in the Italian Alps.

A sharp bend in a dramatic river canyon cut through red rocks.

An unexpected mix of medieval buildings and modern street art.

This enormous monument is one of the most iconic structures in Tokyo, rudely nicknamed "The Golden Turd."

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

A collection of machines designed to break things for science.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

Ruins of the Crusaders' headquarters.