This ancient Irish tower could easily have stood in for Rapunzel's prison.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

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

The giant squid's 27-foot-long corpse lies preserved within a Sarasota aquarium.

A Circus legend leaves an unexpected endowment.

It's not quite as old as its Roman appearance suggests, but this piece of infrastructure served Guatemala City for centuries.

Deep in the Guatemalan jungle stands an ancient pyramid that once marked the reign of a king.

The first hospital in the New World.

After Christopher Columbus died, his son built a fancy house to rule from.

The first official clock in North America, it kept time for the Spanish government of Santo Domingo.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

Towering basalt columns, a creation of fire and ice.

This little Greek plateau is home to thousands of rustic, white-sailed windmills.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This famous archeological mystery may be an ancient example of movable type.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

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

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.