Sumatra is an elongated landmass spanning a diagonal northwest–southeast axis. The Indian Ocean borders the northwest, west, and southwest coasts of Sumatra, with the island chain of Simeulue, Nias, Mentawai, and Enggano off the western coast.
Sumatra (also Sumatera) is one of Indonesia 's large islands and the sixth largest island in the world. Wild and rugged, Sumatra is a blend of Mother Nature extremes, blessed with natural wealth as well as proneness to natural disasters.
Explore Sumatra's rainforests, volcanoes and vibrant cultures in this Indonesia travel guide. Discover Lake Toba, wild orangutans, Mentawai islands and top tips.