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The Kilauea Volcano, at 4,000 feet (1219 m) is one of the most active volcanoes in the world. The Kilauea Summit Caldera is 2.5 miles long, two miles wide and 400 feet deep. The caldera was created in intervals from the 6th century to the 18th century, when lava drained from an underground magma chamber causing the volcano summit to collapse. Kilauea has erupted intermittently at the summit for the past 100 years. The most recent summit flows were in 1974 and 1982. Now, the caldera is quiet with only rising clouds of vapor as reminders of what lies underneath the magic Kilauea’s surface.