 The high annual rainfall has eroded deep valleys in the central mountains, carving out canyons with many scenic waterfalls.On the west side of the island, Waimea town is located at the mouth of the Waimea River, whose flow formed Waimea Canyon, one of the world's most scenic canyons, which is part of Waimea Canyon State Park.At deep, Waimea Canyon is often referred to as "The Grand Canyon of the Pacific".