Italian cave with exceptional acoustics and an unsavory history.

The world's most active stratovolcano is almost always erupting.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

An ancient Egyptian temple in the middle of Madrid, Spain.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

Single runway interrupted by a busy road that cuts across its middle.

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

Whether they are bulls or pigs, these ancient animal sculptures are fascinating relics.

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

This amazingly preserved Doric temple was abandoned before it was ever completed.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

A crushed gate and giant bronze head serve as a reminder of Greece's fight for freedom.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

An ancient octagonal weather station named for the eight Greek gods of wind.

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

Built by the Ancient Greeks, this chariot bridge is still in use today.

A patchwork of ruins from various civilizations in one of the world's oldest continually inhabited cities.

The ruins of this monumental city founded by the first Roman Emperor are strangely overlooked by most travelers.

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

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

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

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