Wildest: Indochina

Cambodia's wildlife and climate are ruled by the monsoon cycle. It is a wild land of extreme rains, raging rivers and flooding lakes that create great challenges for its animals, and a fine balance between seasons.

Around 10% of the world's species live in Vietnam, with tropical jungles fit to burst with wildlife. But less than 50 years ago, things were very different. During the war, Vietnam's forests were decimated, but as it always has, life fought back.

Tucked away in China's southwest corner is a hidden oasis unlike any other. Snow-capped mountains, temperate valleys and tropical jungles are home to a spectacular array of wildlife.

Malaysia is one of a handful of countries in the world described as mega-diverse. Malaysia's animals and plants have exploited every opportunity to carve out an existence and so have adapted to some very strange ways of life.

Thailand is a land of extremes. A country shaped by wild forces, where animals face tough challenges to survive. Tropical rainforests, primeval caves, mangrove swamps and rocky shorelines provide homes for remarkable creatures.