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

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

Traditional 11th-century outdoor tannery.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Crumbling necropolis set high above Fez.

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

Mosaics, storks, and brothels—this ancient city has it all.

Founded as a refugee camp, now a popular tourist spot.

Something's watching you.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Don't blink or you'll miss it.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.