What appears to be an ancient Roman temple is actually a Catholic church.

The giant skeleton sculpture is surprisingly well-traveled.

Romans built the world's tallest artificial waterfall in 271 BC.

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

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Where commuters walk through remnants of an ancient Greek necropolis.

An ambiguous ambience emanates from this centuries old leprosy quarantine.

This medieval "painted village" is famous for its geometric facades.

Overlooking the harbor is a beautiful neglected mansion guarded by two Egyptian sphinxes.

The only quarter of the Old City not dedicated to a major world religion.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

Amid the rubble of Aleppo's Old Quarter, part of a historic market has been restored and re-opened.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.