Gili Trawangan is the largest gili among three that located off northwest coast of Lombok Island. It is around 3 km long and 2 km wide and has population around 700 people. Trawangan name is taken from terowongan word means tunnel. It has a tunnel cave built in Japanese occupation. The Island has most tourist facilities and the most popular in Lombok and beyond, east side of the Island is more developed and crowded cause has better beach than the other side. There is no motorized vehicles on the Island instead of the bicycles and Cidomos ( a small horse drawn carriage) are the main transportation. To travel to and from other gilis is using motorized boats called Island hopping boat.