Hawaii Volcanoes National Park

Location: Hawaii

Year Established: 1916

Area: 323,431.38 acres (1,308.9 km2)

Annual Visitors: 1,693,005

This park on the Big Island protects the famous Kilauea and Mauna Loa volcanoes, two of the world's most active geological features. Diverse ecosystems range from tropical forests at sea level to barren lava beds at more than 13,000 feet (4,000 m).