Up early to another hearty meal. Hector our guide drives us to the trail head where we begin our hike into Actun Tunichil Mucknal cave. We cross the river 3 times along the way before we enter the river once again to swim into the mouth of the cave. We travel some distance following the river, swimming part of the way and climbing over rockfalls, until we reach the cave system. As we are early we have the cave to ourselves. It holds many artifacts and some skeletons dating back almost 1200 years. Stalagmites, stalactites and awesome limestone formations everywhere. After swimming and climbing our way in we return the same way to Pook's Hill. Some of us take to the Roaring River for some river tubing, while others decide to visit the lounge area. A delicious supper with great company. Ray entertains us with stories of the area. We take more nature night walks before we retire.