Exposed after years of wear by the adjacent river, the Red Rocks offer a stark contrast to Kruger's trees and savanna grasslands. Plus, these sandstone slabs are regularly visited by must-see ...

But they are vibrant ecosystems, and some, like the African savanna, are home to the animal kingdom's most recognizable fauna.

the German explorer Heinrich Barth became the first European to discover the then-mysterious prehistoric Saharan rock paintings and engravings, which we now know date back to the African Humid ...