Chet Saonoi Waterfall is a well-known 7-leap-waterfall suitable for swimming. Each leap is 2-5 metres high. Its water source is in Khao Yai National Park. Chet Saonoi Waterfall will be most beautiful in the early cool season (November).
Muak Lek Waterfall is another waterfall having its source in Khao Yai National Park. The surroundings are shady and inviting, thanks to tall trees and lovely decorative plants. You should go there also at the beginning of the cool season