Off the coast of Yemen, in the Arabian Sea, lies isolated Socotra Island, where hundreds of plants and animals have developed into species unique to the island. Socotra is the largest island in an archipelago that includes three other islands. The Socotra Archipelago has been isolated from any large landmass for millions of years, and is now home to a surprising display of biodiversity. Probably the best-known of its endemic flora is the dragon blood tree, with red-colored sap and tightly-clustered branches that look like roots turned upside down. Below, a collection of images of the landscape of Socotra, and the plants and animals that call it home.