A sharp sculpture made of thousands of pieces of jagged glass.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

Monasteries on rock pillars, once accessible only by frayed ropes.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

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.

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

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

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

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

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 gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

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

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

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

According to legend, this ancient column contains healing properties.

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

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

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

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

The ruined doorway is a portal to the building's turbulent and torturous past.

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

An ancient octagonal weather station named for the eight Greek gods of wind.