Similar to Lake Tanganyika, Lake Baikal is formed from an ancient rift valley with a long crescent shape with a surface area of 31,722 square kilometers, smaller than Lake Superior or Lake Victoria. Baikal is home to thousands of species of flora and fauna, many of which cannot be found anywhere else in the world. Therefore, Lake Baikal was recognized by UNESCO as a World Heritage Site in 1996. The area to the east of the lake is inhabited by tribes of Buryat people, who raise goats, camels, cows and sheep. a harsh environment where the average minimum temperature in winter is −19 degrees Celsius and maximum in summer is only 14 degrees Celsius.