A stunning silver lining to global warming's gloomy cloud.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

England's most notorious suicide spot.

Remember that scene in the Matrix, when Neo is in the big white room with all the weapons flying by? Well, this is what it would look like if he had wanted trees instead of guns.

Natural time capsule containing an alien ecosystem.

Half of a waterfall goes into the river while the other half seems to disappear.

The rocks in this arid basin leave trails of movement behind them.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A garden of flying flowers.

A seemingly endless landscape of pure salt stretches far across Bolivia.