Hawaii Volcanos National Park

Hawaii Volcanos National Park, on Hawaii Island, established 1916, has among the largest and most active volcanos in the world. Mauna Loa (13,680 ft/4,170 m) has the Mokuaweoweo crater at its summit. Kilauea, 4,090 ft (1,247 m) high and over 4 sq mi (10.4 sq km) in area, has a fiery floor called Halemaumau. The park has an area of 317 sq mi (821 sq km).