We now take you to East Kalimantan, to a small island called Kakaban, part of the Derawan Islands. Limestone cliffs surround the island and thick forests cover a lot of the land. The surrounding waters are heaven for divers, but really it is the waters inside that interest most people; visitors know it is as the jellyfish lake. Here, surrounded by dense mangrove, thousands of jellyfish dwell within this island lake – the unique aspect is that they are completely stingless, meaning you can swim in the waters surrounded by these interesting creatures.