A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

The Pope’s secret escape route.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

The bears of Bern have been a city highlight for over 500 years.

The second-highest train station in Europe.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

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

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

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

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

The final resting place of the great navigator, or maybe his brother.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

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

The fragmented remains of a massive public bath connected to the city's water supply.

Where hundreds of Japanese civilians committed suicide to avoid being captured by American soldiers during WWII.

This Taiwanese promontory is covered in otherworldly hoodoo formations.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

One of the world's largest tanks mimics the experience of watching rare whale sharks, giant rays, and deep sea creatures from the ocean floor.