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A lot of volcanoes have been in a continuous eruption state for decades and even thousands of years. As the most active volcano in Hawaii, Kilauea has had a history of eruptions. Try hiking the Kīlauea Iki Trail. You will descend through a lush rainforest to the floor of the solidified but still steaming Kīlauea Iki Crater lava lake, according to NPS. Bring water, food, hat, sunscreen and rain gear.