Get your heart racing by speeding down a 400 meter zipline to get to the entrance of the cave. Then, with a guide walk with your headlamp and dip into a natural mudbath deep into the cave. Lastly, take a leisurely swim to to the cave entrance where kayaks will be waiting for you to paddle back. They have even added a little obstacle course should you want to hang around for some more adventure. A must see for any visitor to Phong Nha!