If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

These delicate ruins need more tourists to keep them from fading away.

Hoodoos, naturally eroded land formations, stand 20 feet tall in the Canadian badlands.

Massive volcano in the Andes is the farthest point from earth's center.

Seaside ruins of a settlement that date back to the first century B.C.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

These mammoth-yet-narrow crevasses in the Earth are perfect for taking an otherworldly swim.

Of course Salvador Dalí lived in a castle...

Bolivia's needle-like rock formations.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The centuries-old trees lining both sides of this dirt road may become Madagascar's first natural monument.

Forgotten German bunkers in China create a sharp cultural contrast.

Swarms of dainty flying insects swarm into the Petaloudes Valley to get busy.

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

This pebble beach is so beautiful that taking its rocks is against the law.

Part of one of the largest flooded cavities on the planet, and littered with prehistoric animal bones.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Mysterious hillside with a continuously burning natural fire.

The summer home of the largest colony of bats in the world.

Extraordinary rock formations in open Peruvian fields.

A sacred lake composed of over 300 separate pools of highly concentrated minerals.

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

The world's largest rotating world.

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.