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

Every spring, locals see the shadowy figures of a ghost army of slain Greek soldiers descend upon this ruined fort.

This ancient statue of Dionysus lies unfinished and abandoned in one of Greece's oldest quarries.

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

This building displays the scars of the “Dekemvriana,” a dark time in modern Greek history.

These ancient ruins hide in plain sight next to a dessert shop.

Underneath one of the region's most historic roads lies the home of Plato's successor.

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

When construction began on this hotel, developers were surprised to find the ruins of an ancient civilization.

The only ancient site that remains on the south bank of the sacred Ilissos river.

This small chapel holds the mummified heart of one of the heroes of the Greek Revolution.

A Byzantine church containing the holy remnants of three saints sits atop the site of an ancient temple.

This historic structure has been used as a mosque, a barracks, a prison, a school, and a bakery.

Gladiators once walked this ancient, subterranean passage.

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

The site where hundreds of Greeks were tortured by the Nazi secret police is now a cosmetics store.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

A Byzantine-era church hidden in a wooded area below the Acropolis.

Large collection from the 3rd millennium BCE.

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

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.