Sri Lanka's oceanfront national parks, mangroves, swamps and tropical rainforests have given rise to the amazing range of animals and birds that inhabit its borders. Visit Yala National Park, home to the highest density of leopards in the world, trek through Udawattakele Nature Reserve to hidden forest monasteries and cave dwellings and spot endangered birds in the tropical undergrowth of Sinharaja Rainforest as you journey through the richest wildlife regions of this island nation.