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

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

The home of Greece’s national poet sits crumbling in the middle of a popular tourist district.

Elaborate stone houses constructed from the ruins of war.

According to legend, this ancient column contains healing properties.

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

These caves secretly held national treasures during World War II.

This small museum once served as a royal hunting pavilion for King Otto Friedrich Ludwig.

This Ottoman-era church is hidden amid a busy tourist area.

A historic building houses one of the most important archaeological institutes in Europe.

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.

A tiny Greek Orthodox church from the Ottoman era hides on a busy city street.

An often overlooked ancient site in downtown Athens with substantial history (and nature).

The ruins of an ancient fortification wall sit in front of and underneath this boutique hotel.

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

The ruins of this ancient fortification wall sit in the middle of a quiet, residential intersection.

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

A preserved portion of an ancient Athens barrier is displayed in a hotel basement.

Preserved portions of Athens's ancient defenses are on display in a subterranean parking garage.

The ruins of an ancient mansion sits in front of and underneath a contemporary art gallery.

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

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

This graffitied 19th-century building was a prototype of European industrial architecture.