The largest freshwater lake in South East Asia, Tonlé Sap is of great importance to Cambodia. It changes size with the seasons, increasing in size, from 2,500 square kilometres to 12,500 square kilometres, during the monsoon. Tonlé Sap is home to many ethnic Vietnamese and numerous Cham communities who live in floating villages. From glorious temples and rich heritage to rare wildlife, tropical beaches, and great eco-tourism spots, here are 11 of the best things to see in Cambodia.