A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

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

Display that gathers the basic elements of the universe in one convenient location.

The largest prehistoric ruins south of the Sahara, once a powerful center of international trade.

Erosion and time have created a naturally-formed water park.

The remains of diamond fever taken over by the desert.

A city built from mud and known as the "Manhattan of the desert."

Nature’s skyscraper launches out of the terrain with attitude.

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

A subterranean house of worship carved right out of the bedrock.

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

This massive library holds what was once the largest book collection in the world.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Five ancient libraries, little changed for centuries, preserve a medieval archive of Quranic lore and civic documents