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Visitors to Oahu can navigate by orienting themselves to a few major landmarks. Oahu is made up of two extinct volcanoes, which form the island's two mountain ranges: Waianae and Koolau. The Waianae range curves from Kaena State Park, on the island's westernmost point, past Makaha, Waianae, and Nanakuli to Ko Olina on the sunny leeward shore. The extinct craters of Diamond Head and Koko Head are usually visible from anywhere along the island's leeward coast. The Koolau Range forms a jagged spine that runs from the island's eastern tip along the windward coast to the famous surfing center on the North Shore.