Poseidon? No one seems to know.

A hilltop monastery on the Greek island of Hydra.

An islet filled with wooden houses where the open sea meets a lagoon.

This seaside sanctuary was once one of the most important religious sites for women in ancient Greece.

After a catastrophic forest fire, a Greek artist transformed scorched tree trunks outside an old sanatorium into this haunting sculpture garden.

This lesser-visited World Heritage site in Athens boasts an impressive ensemble of medieval gold mosaics.

The secular incarnation of a religious meditation.

The nuns here cultivate silk to weave some of the finest scarves in the world.

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

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

A whimsical cottage from the 1300s with a preserved Victorian-era post office inside.

Legend says this ancient pagan site can cure all ailments.

A 14th century castle built on the seat of a mighty giant.

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

A circle stone within a stone circle.

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

A open air theatre built on a cliff by an eccentric British woman.

These picturesque ruins crumble beautifully into the ocean.

400-year-old garden, restored to beauty.

A wonderful safe haven founded in the 1960s to rescue endangered monkeys from the pet trade.

The tale of this reverend and his parish is colorful in many a way.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

Now nearly dry, this lake is said to be the ancient home of the Lady of the Lake, and was once thought to be bottomless.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.