More than 30,000 flamingos descend on the Makgadikgadi salt pans during the wet season.
El Niño and La Niña are two extreme phases of a natural climatic cycle that cause erratic weather across the globe.
Wild salmon can swim 1,400km and climb 2,000 vertical metres returning to spawning sites in the Salmon River and its tributaries.
The Wallace Line is a bio-geographic boundary separating Asian species in the west from Australasian species in the east.
With each tide, Australia's Buccaneer Archipelago experiences a unique natural phenomenon known as Horizontal Waterfalls.
Craters of the Moon Lava Field is made up of 60 lava flows from a series of eruptions that began 15,000 years ago.