Ngorongoro Crater (Photo: Kitch Bain/Shutterstock)Ngorongoro Crater, Tanzania
Nicknamed "Africa's Garden of Eden," this volcanic crater houses about 25,000 wild animals, as well as an incredibly diverse sub-Saharan ecosystem—meaning visitors can see everything from open plains to alkaline lakes in one spot. The crater serves as a natural zoo, holding the "big five" (rhinos, lions, leopards, elephants, and buffalo) all in one place. Visit in December or June during the annual migration of wildebeest and zebra, when over 1 million of the creatures enter and exit the area.
