The walls and streets of the ancient city are peppered with penises.

Traditional 11th-century outdoor tannery.

The other side is actually green.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

God's Saharan sandbox of wrath.

Fifteen Jodhpur queens left their handprints before going to their fiery death.

Legend has it a commoner volunteered to be buried alive in the foundation so that the great fortress could be built.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The oldest known university in the world is in Fez, Morocco.