Isabela Island (Spanish pronunciation: [isaˈβela]) is the largest island of the Galápagos with an area of 4,586 square kilometres (1,771 sq mi) and length of 100 kilometres (62 mi), almost four times larger than Santa Cruz, the second largest of the archipelago. Isabela Island is larger than every other island in the Galápagos combined. It was named after Queen Isabella I of Castile. The island straddles the equator. This island was originally named Albemarle Island for the Duke of Albemarle by Ambrose Cowley, one of the first Europeans to set foot on the islands, in 1684.

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