Hawaii Volcanoes National Park is on Hawaii Island (the Big Island). At its heart are the K lauea and Mauna Loa active volcanoes. The Crater Rim Drive passes steam vents and the Jaggar Museum, which features volcanology exhibits and a viewpoint overlooking Halemaumau Crater. Thick ferns mark the entrance to the Thurston Lava Tube (N huku). The Chain of Craters Road weaves over lava. Trails crisscross the park. In 2010, the United States Mint began issuing 56 quarter-dollar coins featuring designs depicting national parks and other national sites as part of the United States Mint America the Beautiful Quarters Program.