The Sangumburi Crater was designated by the South Korean government as a Natural Monument. It is a crater that spans a whopping 2km in circumference and is situated on the southeastern part of Jejusi. It is a flat crater, about 100 metres deep, 650 metres wide and 2070 metres in total circumference. An aerial view might actually make visitors think that it is a man-made stadium. A wide diversity of flora can be found within the crater such as red-thorn trees, magnolia trees and rare winter strawberries to the north. The south features evergreens, mountain strawberries and evergreens. The wide spectrum of plants and trees in a congested space has been a subject of many scientists’ studies as well. Regardless, this natural wonder is definitely a must see.