The Thar is known as the Great Indian Desert. Scorched by a near-permanent drought, it's India's most inhospitable region.

The Western Ghats are amongst Earth's most biodiverse regions, and these mountains are the birthplace for many of India's endemic species.

Bordered by the Himalayas and the tropical jungles of Indochina, north-east India is a meeting point for many of the area's most iconic animals.