Seonunsan Mountain [National Geopark]

Seonunsan is a 336-meter coastal mountain in Gochang, Jeollabuk-do, designated as part of the Jeollabuk West Coast National Geopark for its distinctive Mesozoic volcanic-rock formations — particularly the angular dacite columns visible along the ridge, formed roughly 90 million years ago in Cretaceous-era volcanic activity that shaped much of the Jeollabuk coast. Despite its modest height, the mountain offers some of the most dramatic ridge-walking in the southwestern Korean mainland, with rocky pinnacles, cliff overhangs, and views down over Seonunsa Temple in the valley below. The full ridge traverse takes about three hours at moderate difficulty; a shorter loop to the temple and back via the Dosoram cliff hermitage takes 90 minutes. Seonunsa Temple itself is one of Korea's older working Buddhist temples (founded 577 CE during the Baekje period), and Dosoram — a small hermitage cut into the cliff face — is one of the more atmospheric small Buddhist sites in southwestern Korea, particularly at dawn when the mist rises off the valley. Best in late autumn for foliage and the geological rock-color contrast against the leaves — Seonunsa's landmark ginkgo grove peaks in mid-November. Pair with Seonunsa Temple, Dosoram, and the broader Gochang cluster including the Gochang Dolmen (UNESCO 2000, jointly with Ganghwa and Hwasun).