A dedicated musalla inside Ilchulland, a subtropical botanical theme park in Seongsan on Jeju's east side. It has separate men's and women's prayer rooms, open to park visitors with a ticket. The park is built around Micheongul (미천굴), a natural lava-tube cave that stays cool in summer and warm in winter thanks to its stable underground temperature, a welcome break from Jeju's weather in either season. Beyond the cave, Ilchulland spreads across subtropical greenhouses, a cactus house, bonsai and fossil gardens, and a Jeju folk village, so prayer, a cool cave walk, and gardens all sit on one ticket for an easy half-day. Adult admission is around 12,000 KRW, with free parking. Roughly 20 minutes from Seongsan Ilchulbong.