High Quality Content by WIKIPEDIA articles! Weh Island or Pulau Weh or Pulo Weh (by the local population commonly referred to only as "Sabang", the name of the largest city) is a small active volcanic island to the northwest of Sumatra. It was originally connected to the Sumatran mainland and became separated by sea after the volcano`s last eruption in the Pleistocene era. The island is situated in the Andaman Sea. The largest city on the island, Sabang, is the northernmost outpost of Indonesia.