Sue Perkins' exploration of Thailand kicks off in the breathtaking Thai Highlands and features a massage in a women's prison, a giant cauldron of elephant dung, and longboat racing.

Sue heads south to Phuket, the country's largest island. Making her diving debut in the tropical waters of the Andaman Sea, she learns how destructive humans can be to the fragile coral reefs and participates in a litter-picking exercise.

Sue visits Thailand's exotic capital, Bangkok, where she's thrown into the ring with a champion Muay Thai fighter; Sue learns the shocking extent of tiger exploitation.