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Socotra Island, "The most alien-looking place on Earth."

Located off the coast of Yemen in the Indian Ocean, the island of Socotra contains some of the world's most astonishing and unique plant forms. More than a third of the 800 or so species on the island are found nowhere else on earth. Found only on the island's plateaus, this plant was christened the dragon's blood tree by traders who believed that its crimson sap was actual dragon's blood with medicinal properties.

The island was recognized by the United Nations Educational, Scientific and Cultural Organization (UNESCO) as a Natural World Heritage Site in July 2008.