Tree of Life In Bahrain is the important tree. Sinharaja Forest Reserve is a national park in Sri Lanka. The densely forested reserve, home to an incredible number of different trees and animal species, including amphibians, reptiles, birds, mammals and insects, is 21 kilometers from east to west and 7 kilometers from north to south. The hilly virgin rainforest was saved from the worst of commercial logging by its inaccessibility.