The listed optional pool fee applies per adult, per session, during peak season (July and August); the fee is 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.