Phong Nha-Ke Bang
Flora and fauna
Tien son caves: It is 50,000 dong to see both caves and 200,000(11$) to rent a boat for up to 10 people or 240,000 for 14 people. You can share a boat with other tourist that show up. Boat is needed. Caves are exquisist.
Nuoc Mooc spring: 50,000 for ticket. Transportation can be negotiated to take you there from Phong Nha village.