An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Italian horror legend Dario Argento’s own shop hides a sinister museum-dungeon in the basement.

The pedestrian traffic signals in Brazil's teeming metropolis light up with clues to nearby landmarks.

This singular art museum in São Paulo is unique inside and out.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

Beautiful public park off the beaten path and away from tourists.

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

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

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

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

This sixth-century church housed an icon with eyes so beautiful legend has it they inspired the name of a Greek city.

One of the most photographed locations in the entire city.

Dedicated to the god Dionysus, this theatre was used for both musical and theatrical performances.

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

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

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

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

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

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

A magical, if a bit tacky, 1960s castle conjures up medieval fairytales and Greek mythology.

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

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

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