One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A curious memento mori hangs in the magnificent Cathedral of Segovia.

These "mermaids" that surround a plaza in Segovia are rather sphinx-like.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

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

The inverted pyramid design of this station stands out amid Bratislava's urban landscape.

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

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

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

A Byzantine church containing the holy remnants of three saints sits atop the site of an ancient temple.

This abandoned Greek island was the last active leper colony in Europe.

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 15th-century island fortress later served as home to the executioners no one wanted to live near.

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

The hallucinogenic center of the ancient world.

Monasteries on rock pillars, once accessible only by frayed ropes.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.