Hallasan National Park summit, there is a crater lake called “Baekrokdam.” Since the mountain has high altitude, there are a number of alpine plants and animals. 1800 kinds of plants, including 400 kinds of specimen plants and 50 kinds of special plants, are living in Hallasan. So the Jeju island is designated by Biosphere Reserve in 2002 and Hallasan National Park is one of the region of Jeju Bioshere. Hallasan National Park Hallasan National Park () is located in the province of Jeju-do, South Korea. It was designated as the 9th national park in 1970. It features the highest mountain in South Korea,
Lascar (volcano) trend that includes Aguas Calientes. Six craters are located on the volcano, but sometimes only five craters are counted, in which case the central crater is considered to be the active one. The extinct western cone (also known as Apagado) is composed of layers of lava and pyroclastics. Its large crater is filled by another cone, which forms the highest summit of the Lascar volcano. Immediately east of it lies the eastern cone, which is contiguous with the western cone. The eastern cone (also known as Activo) is capped off with three distinct craters which are delimited by arcuate fractures.