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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

A sculpture serving as an homage to Pope John Paul II.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

The titular "little arch" near this Italian resort is one of the most popular diving spots in the country.

Every inch of this chapel is covered in craftsmanship from across the world.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

Romans built the world's tallest artificial waterfall in 271 BC.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

A half-mile-long stretch of medieval forts built after a devastating pirate attack persists amid the modern port city.

The oldest working mechanical clock in the world.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

The oldest public library in Ireland.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

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

This irregularly shaped sea fortress has defended not one but three different sovereign states.

A collection of grotesques lines the walls of this Italian villa.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

Water and windows define this defensive Italian well.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Geothermal waterfalls in Tuscany.