Hallasan National Park (9.6 km), Seokgulam Trail (1.5 km), Gwaneumsa Trail (8.7 km), Donnaeko Trail (7 km), and Eoseungsaengak Trail (1.3 km). The longest trail is Seongpanak Trail which takes about 4.5 hours. Hallasan comprises 153.112 km of the Jeju Island. It rises 1.950 m above the sea level which means the highest mountain in South Korea. This mountain was formed in the fourth Cenozoic era by outburst of volcano. It is mostly composed of basalts. It is extending east and west, and it has high and gradual descent. On the other hand, the south part of the mountain is steep. In the
Volcano: The Blast Coaster flying debris. Volcano: The Blast Coaster once held the record of the highest inversion in the world at . In May 2013, GateKeeper at Cedar Point took the record with an inversion that stands at . Volcano: The Blast Coaster Volcano: The Blast Coaster (often shortened to Volcano) is a launched inverted roller coaster at Kings Dominion in Doswell, Virginia. Designed by Werner Stengel and built by Intamin, Volcano was the world's first inverted roller coaster to feature an linear induction motor (LIM) and is the only one of its kind that completes a full circuit. The roller coaster opened