France's most famous cemetery, with some of its most curious tombs.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The celebrated eyesore created by starry-eyed sweethearts.

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

Hideout of thieves, monks, and goat-footed gods.

The rocky remains of an ancient Greek forest.

Where commuters walk through remnants of an ancient Greek necropolis.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Large collection from the 3rd millennium BCE.

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

The secular incarnation of a religious meditation.