Mocha (Spanish: Isla Mocha) is a small Chilean island located west of the coast of Arauco Province in the Pacific Ocean. The island is approximately 48 km² (19 sq mi) in area, with a small chain of mountains running roughly in north-south direction. In Mapuche mythology, the souls of dead people travel west to visit this island. The island today is home to the Mocha Island National Reserve, a nature reserve that covers approximately 45% of the island's surface. The island is noted as the location of numerous historic shipwrecks.