Palm Jumeirah is a global icon because it is the world's largest man-made island, a feat of engineering that added 78 kilometers (48 miles) to Dubai's coastline. What makes it truly special is that it was constructed using only sand and rock—no concrete or steel was used to create the core of the island itself. To achieve its perfect palm-tree shape, engineers used high-tech satellite GPS to guide the placement of 94 million cubic meters of sand dredged from the sea floor. The island is protected by an 11-kilometer crescent-shaped breakwater that allows water to circulate while shielding the "fronds" from erosion and waves. Beyond the technical specs, it is a "vertical city" of luxury, housing the world-famous Atlantis The Palm, thousands of private villas with their own beaches, and a dedicated monorail system. It is often referred to as the "Eighth Wonder of the World" due to its sheer scale and the audacity of its design.