A former military hospital is now used to study and preserve artifacts of the Acropolis.

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

According to legend, this ancient column contains healing properties.

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

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

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

This Byzantine Church was moved from Paris to Athens block by block.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

Where commuters walk through remnants of an ancient Greek necropolis.

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

One of the best collections of Byzantine art housed in a magnificent, 19th-century neoclassical home.

Scars of this building's past life as a violent prison still cover its walls.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

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

An ancient site that has revealed incredible artifacts including portions of the Themistoclean Wall.

With no menu and no sign, this 130-year-old taverna doles out affordable home cooking.

There are many Byzantine-era churches still standing in Athens, but this is the only one with a 2,500-year-old column rising through its roof.

This striking sculpture of Icarus honors Greece's fallen flyers.

Savor sheep milk yogurt at the last of Athens' dairy bars.

An important example of architectural history slowly decays in the city center.

A crushed gate and giant bronze head serve as a reminder of Greece's fight for freedom.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This once architecturally advanced housing complex is now a haven for squatters that still bears the scars of war.

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