Halla Arboretum was established for nature research and preservation. Located near Gwangioreum Volcanic Cone, there are many kinds of native trees and subtropical plants exhibited here. The arboretum serves as a wonderful training resource for students and experts alike. It is also a popular themed attraction among tourists. There are 1,321 endangered and rare species that are preserved and over 100,000 plants on display. The arboretum serves not only as a tourist attraction, but also as an enjoyable and relaxing spot favorited by the locals of Jeju Island.