Stenciled handprints and wall paintings dating back 10,000 years, some of the earliest forms of cave art.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

A faux desert landscape in the middle of the jungle that sprouts oases during the rainy season.

This striking, two-toned confluence of rivers is visible from space.

An explosion of natural color known as "the river that ran away from paradise."

Enchanting cave with a river crashing through the roof.

A limestone wonderland of water and subterranean secrets.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

A massive work of modern art that appears to be a crop circle in the middle of the desert.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

Underwater volcanic eruption forms new island off the coast of Tonga.

Largest Kauri tree in New Zealand.

An Australian lake whose pink hue defies scientific explanation.

Australian Lake set aglow by Noctiluca Scintillans.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

A tiny, picturesque island, where cows and wild horses wander around the houses.

An ancient Viking village in North America that predates Columbus by 500 years.

A lake in the middle of the tundra of Quebec is said to be the purest freshwater lake on Earth.

This crescent-shaped sliver of sand is a magical haven for a herd of feral horses.

Beautiful views and Roman-style statues on the Italian coast.