A 16th-century Andalusian palace.

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

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

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

Wander among free-roaming storks at the sanctuary that helped save them from local extinction.

These medieval ruins have survived since the 12th century, even providing shelter from the Nazis.

This historic stone gate tower is now just a lonely relic in the middle of a swamp.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

The first archaeological site discovered by aerial photography.

Famously misunderstood wonder of the ancient world

The oldest working mechanical clock in the world.

In the ruins of Glastonbury Abbey lies the alleged resting place of the legendary king.

A dark Victorian well house now plays host to mystical waters and pagan shrines.

This hill and tower are steeped in legend, from King Arthur to the Holy Grail.

Fascinating town where normal life interfaces with the occult.

The oldest residential street in Europe also features an optical illusion.

This astronomical clock is the second oldest in England.

A fantastic castle rumored to be the birthplace of King Arthur.

Cornish legend says these ancient circles were people turned to stone for playing hurling on a Sunday.

Perhaps the only prehistoric monument with its very own public bus stop.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

A neolithic dolmen that was rebuilt after collapsing during the 19th century.

These picturesque ruins crumble beautifully into the ocean.