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

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

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

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

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

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

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

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

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

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

These caves secretly held national treasures during World War II.

A unique housing complex born from the aftermath of the Greek Civil War.

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

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

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

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

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

This abandoned shopping arcade has new life as an art installation.

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

This Ottoman-era Greek Orthodox Church was built to honor Agia Pareskevi, a Christian saint.

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

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.

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

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