Question: An American National Park located in the U.S. state of Hawaii is home to one of the world's most active volcanoes, and lets visitors explore what site?

Context articles: Katmai Wilderness
Hawaiʻi Volcanoes National Park
Hawaii Volcanoes Wilderness
Sangay National Park
Puracé National Natural Park
Hawaii Center for Volcanology
Piton de la Fournaise
Aleutian Range
Devastation Trail
Kirishima-Yaku National Park

The Katmai Wilderness is a wilderness area in Alaska, United States.
 It is part of the Katmai National Park and Preserve.
 Today 15 active volcanoes line Shelikof Strait, which separates Katmai National Park and Preserve from Kodiak Island.
 Katmai protects this volcanic "laboratory" and, equally important, large numbers of brown bears. (Although brown and grizzly bears are considered the same species, grizzlies usually live at least 100 mi from shore and don't grow to be as huge, due to a more limited diet.)
 salmon spawn in Katmai in vast numbers, attracting the bears.
 Here you'll find huge lakes whose edges provide nesting spots for swans, ducks, loons, and grebes.
 The area is shared by moose and caribou and numerous smaller mammals.
 A campground exists inside the park, and preregistration is required.
 The campground has water, pit toilets, food-storage caches, fire pits (but firewood is limited), and picnic tables.
 Meals are available at nearby Brooks Lodge.
Hawaiʻ i Volcanoes National Park, established on August 1, 1916, is an American National Park located in the U.S. state of Hawaii on the island of Hawaii.
 It encompasses two active volcanoes: Kīlauea, one of the world's most active volcanoes, and Mauna Loa, the world's most massive shield volcano.
 The park delivers scientists insight into the birth of the Hawaiian Islands and ongoing studies into the processes of volcanism.
 For visitors, the park offers dramatic volcanic landscapes as well as glimpses of rare flora and fauna.
Hawaii Volcanoes Wilderness is a designated wilderness area within Hawaii Volcanoes National Park on the island of Hawaii in the U.S. state of Hawaii.
 It was designated in 1978 with 123100 acre , and was later expanded to 130790 acre .
 Wilderness designation covers the northwestern extension of the National Park, including Mokuaweoweo, the summit of the volcano Mauna Loa.
 In the southwestern portion of the park, a large chunk of wilderness includes several miles of coastline, a small portion southeast of the visitors center, and the ʻ Olaʻ a Forest, which is separate from and just north of the park.
Sangay National Park (Spanish: "Parque Nacional Sangay" ) is a national park located in the Morona Santiago, Chimborazo and Tungurahua provinces of Ecuador.
 The park contains two active volcanoes (Tungurahua and Sangay), one extinct volcano El Altar (Kapak Urku), and ecosystems ranging from tropical rainforests to glaciers.
The Puracé National Natural Park (Spanish: "Parque Nacional Natural Puracé" ) is a national park located in the Andean Region of Colombia, southeast of the city of Popayán in the Cordillera Central range.
 Its main feature is the active stratovolcano Puracé, one of Colombia's most active volcanoes.
 Four of the country's most important rivers originate within the area: Magdalena River, Cauca River, Japurá River and Patía River.
The Hawaii Center for Volcanology is a cooperative effort between the School of Ocean and Earth Science and Technology at the University of Hawaiʻi at Mānoa, the Hawaiian Volcano Observatory of the United States Geological Survey, and the Center for the Study of Active Volcanoes at the University of Hawaii at Hilo.
 The loosely organized cooperative was created in 1992 to "bring together experts from around the state of Hawaii so that we might better understand these magical mountains of fire", and consists of approximately 80 scientists; its site is maintained by members of the School of Ocean and Earth Science and Technology staff.
Piton de la Fournaise (French): "Peak of the Furnace" is a shield volcano on the eastern side of Réunion island (a French department) in the Indian Ocean.
 It is currently one of the most active volcanoes in the world, along with Kīlauea in the Hawaiian Islands (Pacific Ocean), Stromboli, Etna (Italy) and Mount Erebus in Antarctica.
 A previous eruption began in August 2006 and ended in January 2007.
 The volcano erupted again in February 2007, on 21 September 2008, on 9 December 2010, which lasted for two days.
 and on 1 August 2015.
 The most recent eruption began on 14 July 2017.
 The volcano is located within Réunion National Park, a World Heritage site.
The Aleutian Range is a major mountain range located in southwest Alaska, and it extends from Chakachamna Lake (80 miles/130 km southwest of Anchorage) to Unimak Island, which is at the tip of the Alaska Peninsula.
 It includes all of the mountains of the peninsula, and what makes it so special is its large number of active volcanoes, which are also part of the larger Aleutian Arc.
 The mainland part of the range is about 600 miles (1000 km) long; the Aleutian Islands are (geologically) a partially submerged western extension of the range that stretches for another 1,600 km (1000 mi).
 However the official designation "Aleutian Range" includes only the mainland peaks and the peaks on Unimak Island.
 The range is almost entirely roadless wilderness, and Katmai National Park and Preserve, a large national park within the range, must be reached by boat or plane.
Devastation Trail is a trail at Hawaiʻi Volcanoes National Park.
 The paved trail allows visitors to explore the site of 1959 eruption of Kīlauea Iki crater.
Kirishima-Yaku National Park (霧島屋久国立公園 , Kirishima-Yaku Kokuritsu Kōen ) is a national park in Kyūshū, Japan.
 It is composed of two parts: Kirishima-Kagoshima Bay, an area of Kagoshima Prefecture and Miyazaki Prefecture known for its active volcanoes, volcanic lakes, and onsen; and Yakushima, an island south of Kyūshū in Kagoshima Prefecture, known for its cryptomeria or "yakusugi" (屋久杉 ) .