The Revillagigedo Islands (Spanish: Islas Revillagigedo, IPA: [reˈβiʎa xiˈxeðo]) or Revillagigedo Archipelago are a group of four volcanic islands in the Pacific Ocean, known for their unique ecosystem. They lie approximately 390 kilometres (240 mi) southwest of Cabo San Lucas, the southern tip of the Baja California peninsula, and 720 to 970 kilometres (450 to 600 mi) west of Manzanillo.