Palm Jumeirah

Palm Jumeirah remains the largest man-made island in the world, creating 520 kilometers of new shoreline from 94 million cubic meters of rock and sand. Built in just two years, it cost $12 billion and now houses 78,000 residents within its fronds. The island's monorail carries 1.5 million passengers yearly, connecting to Dubai's metro, and its Atlantis hotel features a 45 million-liter aquarium.