List of national parks of the United States by elevation
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This is a list of United States National Parks by elevation. Most of America's national parks are located in mountainous areas. Even among those located close to the ocean, not all are flat. Those few that are low-lying preserve important natural habitats that could never exist at high altitudes. Several national parks protect deep canyons with great vertical relief. There are also three national parks whose primary features are caves, the depths of which are still being explored.