This is a nature preserve in an absolutely magnificent area, with towering sheer cliffs, lush greenery, and a beautiful lake. It is experienced via rented sampan, in a 2 hour ride. Our rower, a petite young woman, was amazingly skilled. Part of the boat trip is through a number of narrow caves. Don't do this if you are claustrophobic, but, otherwise, it is an very interesting and enjoyable experience.