Far off the coast of Yemen lies isolated Socotra island, where hundreds of plants and animals have developed into species unique to the island. The best-known of these might be the Dragon Blood trees, with their densely-packed crowns and blood-red sap. Socotra, sometimes referred to as "the Galapagos of the Indian Ocean," is slowly emerging from its long isolation -- in 1999, the first airport opened, and tourism began to pick up. In an effort to counter any negative impacts, UNESCO recognized the island as a World Natural Heritage Site in 2008, promoting conservation of the unique environment and some of its endangered species.