Alejandro Selkirk Island (Spanish: Isla Alejandro Selkirk), previously known as Más Afuera (Farther Out (to Sea)) and renamed after the marooned sailor Alexander Selkirk, is the largest and most westerly island in the Juan Fernández Archipelago of the Valparaíso region of Chile. It is situated 180 km (100 nmi; 110 mi) west of Robinson Crusoe Island in the southeastern Pacific Ocean.
