Where commuters walk through remnants of an ancient Greek necropolis.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

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

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

This stone tower was built to protect Crete from incoming pirates.

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

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

The oldest known standing wooden building in the world is a chamber inside a burial mound.

An Ottoman-era mosque looking over the Black Sea.

Roman ruins top white travertine terraces formed by ancient hot springs.

Home to some of the oldest hominid fossils ever found.

Caves that can't seem to quit producing the remains of prehistoric humans.

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

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

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

A subterranean house of worship carved right out of the bedrock.

Only a fragment of this 15th-century Dance of Death survives today.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

Berlin's old airport.

The bones of the Biblical Magi traveled to Constantinople and Milan before landing in their current home inside an elaborate golden reliquary in the Cologne Cathedral.

A city's controversial tribute to its founder depicts townspeople flashing their bare behinds.

This ancient monastery complex was transformed from an island to a peninsula when the lake was partially drained.