Manjanggul Lava Tube, Lava Hole Largest and grandest in the World

Jeju volcanic island, located 130 kilometers from the southern coast of the Korean Peninsula, has a system of hallways lava (lava tube) wide. Natural channels where the magma flowed into the cave is now empty parts into the hall lava world. This cave, in addition to providing an opportunity for scientific research, is also a popular tourist destination.

The most impressive is the Geomunoreum Lava Hole system, formed by flows of basaltic lava when volcanoes erupt Geomunoreum about 300-200 thousand years ago.

The volcano has a height of 456 meters and the lava flow into the coastline 13 km away, and while doing so, created a lot of hallway / lava tubes.

Manjanggul Lava Tube is the largest cave in this system. This hallway stretches as far as 8928 meters and the height to 30 meters and width of 23 meters.

The inside of the hall is decorated with multi-colored carbonate decorations and formations commonly found in lava tubes are innumerable. These include lava stalactites and stalagmites, columns lava, rock lava flow, helictites and blister lava, coral caves, benche, bridges lava, lava shelf and striations.

At the end of one hallway lava open for tourists, there is a large lava field that is formed when a large amount of lava spilled from the upper level to the lower level. Huge lava columns stand 7.6 meters tall and is the largest known lava fields in the world.

Around 30,000 arch bat wings (Miniopterus schreibersii) has been lodged permanently in the hall, forming the largest colony of bats are known to live in Korea.

About 38 species have been identified in a cave creature System Geomunoreum Lava hallway, and the most common is the spider cave Jeju (Nesticella quelpartensis).