Kilauea is the most active volcano on the Big Island. In fact, the rangers say it is the most active in the world. In January, 2009, there were two accessible places where eruptions were occurring. One was at the top inside Kilauea Crater, in a smaller crater called Halema'uma'u Crater. The other eruption was down by the sea, near Kalapana, the town that was wiped out by a lava flow in 1990.