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
Roccamonfina (volcano) Roccamonfina (volcano) The Volcano of Roccamonfina is an extinct volcano in Roccamonfina, Campania, southern Italy. It was active from some 650,000 to 50,000 years ago. It comprises an isolated large cone of some perimeter between the Monti Aurunci, the plain and valley of the Garigliano, the Monte Massico and the Monti Trebulani. The central caldera has a diameter of nearly . Volcanic activity is now replaced by minor seismic movements and by the presence of mineral waters. The mount is part of the Roccamonfina-Garigliano Mouth Regional Park, created in 1999. The Ciampate del Diavolo are a series of hominid footprints