We are in Dong Hoi, Vietnam right now, staying in a farmstay,( a small hotel in the countryside ). Yesterday we took a tour through the Phong Nha-Ke Bang National Park. The park was created to protect some of the worlds largest caves. In the morning, we visited a huge cave that was 32 kilometers long. In the afternoon, we paddled some kayaks into another cave. It was really fun because it wasn’t a typical tourist attraction. We hiked about a kilometer into the cave, through thick mud. We had to stop after that, even though the cave was about 15 kilometers long because we had barefeet and the rocks got really sharp  under the mud.

We had a huge mudfight and then went back, stopping to rinse off the mud, and went for a swim in total darkness on the way out. Today we rode bikes through the countryside and into the small town of Phong Nga (see video).We hopped on a boat and visited another cave about 45 minutes out of town. It is the second biggest cave in Vietnam and the rocks inside are 400 million years old.  

- Kiva