Basically, there are over 360 parasitic volcanoes on Jeju island most of which have no craters. Those that do have craters shaped like upturned bowls or horseshoes. However, Sangumburi crater which was formed by an explosion without the ejection of lava or volcanic ash has one single hole known as the Marr crater. It’s the rarest type in Korea and indeed the world.
Sangumburi crater was designated as Natural Monument No. 263, the reason being that the plants growing inside the crater have been isolated even from the plants in Mt. Halla. Because of this phenomenon they have become valuable resources for studying the geographical distribution of plants. Add this to the priceless value of the crater itself for geological study and you can see why this crater is so unique.
Sangumburi is located in Gyorae-ri, Jocheon-eup, Jeju city, 400 meters above sea level with an exterior circumference of 2,067m, and an interior circumference of 756m. Its height is 438m, depth 132m. It is also well known as a habitat for various wild animal ranging from mammals including roe deers and badgers, to birds and reptiles.
This place is good to go in Autumn as you can see the waves of silver grass !
*Operating Hours :
From 9 AM to 6:40 PM ( March to October ) – Last admission 6 PM
From 9 AM to 5:40 PM ( November to February ) – Last admission 5 PM
*Admission Fees : Adult 6,000 KRW / Teenagers : 3,000 KRW / Children : 3,000 KRW