Gili Betagan is the largest and most developed of the famous secret islands of Gili, also known as Gili Lampo because of the lighthouse it was built during the war which you should also visit. What distinguishes Gili Petajan from the rest of the surrounding islands is its climate and Amazonian nature, due to the mangrove forest that covers most of the island, and you can feel the purity of the air everywhere around the island. In addition, you can experience diving under the depths of the water and see the wonderful marine life, coral reefs, and even the wonderful Nemo fish. In addition, the hills surrounding the island give you the opportunity to see a wonderful view of Mount Rinjani, and some believe that the sunset in Petajan is the best in Indonesia.