Alejandro Selkirk is the largest of the Juan Fernández Islands at 49.5 km (19.1 sq mi), and its highest peak, Cerro de Los Inocentes, is also the highest point of the archipelago at 1,268 m (4,160 ft). The island's population was 57 in 2012. Robinson Crusoe is the second largest island in the archipelago at 47.9 km (18 sq mi); its highest peak, El Yunque, is 915 m (3,002 ft). The population of Robinson Crusoe was 843 in 2012. Santa Clara is 2.2 km (0.8 sq mi) in area and reaches a height of 375 m (1,230 ft). Santa Clara is uninhabited. The maximum elevations of Juan Fernández, 915 m (3,002 ft) for Robinson Crusoe and 1,329 m (4,360 ft) for Alejandro Selkirk, respectively, are high enough to cause the phenomenon known as Kármán vortex street, which can be seen from space.

The archipelago was discovered on 22 November 1574, by the Spanish sailor Juan Fernández, who was sailing south between Callao and Valparaíso along a route which he also discovered, hundreds of miles west of the coast of Chile, which avoided the northerly Humboldt current. He called the islands Más Afuera, Más a Tierra, and Santa Clara.

When someday comes you'll need to get in.

When someday comes you'll need to be able to get around.