This landmark is one of the important monuments in the city and the reason for this debris is the crater flow disaster of the Unzen Fujindak eruption that hit the Chimbara Peninsula in 1992, where lava filled the area and the area around the park was buried with earth and sand about 2.8 to 3 meters, but Because the speed with which the earth and sand flowed was slow, so houses and houses were buried in the earth and sand without collapsing. Visitors can tour this area and learn more about the impact of the Mount Unzen disaster .