Jusangjeolli Cliff is a roughly 1-kilometre stretch of hexagonal basalt columns on Jeju's south coast in Jungmun — the largest natural columnar joint formation in Korea. The columns rise 30–40 metres above the sea, formed when basalt lava from Hallasan cooled and contracted at the sea's edge approximately 140,000 to 250,000 years ago. A clifftop boardwalk follows the columns past observation decks where surf crashes into the geometric rock face — most dramatic on windy days. A geological Jeju Island highlight for Muslim travellers, easily combined with Cheonjeyeon Falls and Jungmun Saekdal Beach within a five-minute radius. Modest entry fee, accessible boardwalks.
