This commercial and retail center was crafted from walled military barracks.

An Iron Age hillfort above Britain's oldest chalk figure

This tangled English forest looks like something right out of a fairytale.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

A less famous, short-lived meeting spot of the Inklings.

In 1943 the British military took control of this village, telling residents they had to leave temporarily. The villagers were never allowed to return.

An Iron Age hill fort turned scenic nature park.

These caves secretly held national treasures during World War II.

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

Legend says this sacred tree was a gift from goddess Athena.

An ancient Greek monument and a Byzantine church coexist inside this cave.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

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

Also known as the Temple of Poseidon, this is one of the best-preserved Greek temples in the world.

Buried next to Pompeii, this lesser-known Roman villa was the opulent vacation home of Emperor Nero's wife.

These ruins of a Phoenician sanctuary in Sicily have a dark history.

Italian cave with exceptional acoustics and an unsavory history.

A collection of art from Bulgaria's time as a communist state.

Eastern Bloc nostalgia, anybody?

A vast Communist-era exhibition space in the Bulgarian capital.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

Legends surround this natural rock formation that looks like a Moorish king wearing a crown.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.