Covered in dense jungle, Pulau Tuangku is the largest of the Banyak Islands. Surfers head to Ujung Lolok, the headland at the south of the island, complete with several world-class breaks. In the northern part of the island is Haloban, a friendly village; Suka Makmur, a Christian village, is further south. With a guide it’s possible to summit Gunung Tiusa (313m), for an epic view of the surrounding islands (five hours return), and visit a cave full of stalagmites.