Next we headed over to The Viking Cave on Phi Phi Ley. The name came about from the presence of ancient paintings which resembles Viking Ships on its walls. Besides ancient paintings, this cave also houses a lucrative trade – harvesting of swifts saliva for Bird Nest, a Chinese delicacy. The unstable looking bamboo scaffoldings you see in the photo are for workers to climb on to reach the swifts nests. Not the safest job in the world!