The listed optional pool fee applies per adult, per session, during peak season (July and August) the fee is KRW 30,000 per adult, per session and KRW 15,000 per child, per session . During off-peak season (January–April and November–December), the fee is KRW 20,000 per adult, per session, and KRW 10,000 per child, per session. During semi-peak season (May–June and September–October), the fee is KRW 25,000 per adult, per session, and KRW 12,000 per child, per session.