The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

Some believe this abandoned Brutalist masterpiece inspired George Lucas's Sandcrawler.

A single column facing the sea is all that's left of one of the most important temples of Magna Graecia.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

An abandoned quarry hides an open-air gallery of huge sculptures, some made from the rubble of 9/11.

An abandoned monastery sits on a far-off island in the Adriatic Sea.

A galley-shaped memorial to the prisoners of an infamous fortress.

In this museum, visitors are invited to touch the art.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.