Valid for purchases made in KRW only. Offer is limited to 5 redemption(s) per cardholder during the promotion period. UOB Mastercard will provide the rebate on the first 5 qualifying transaction. Eligible UOB Mastercard card registration and offer activation is required prior to purchase by going to mtr.mastercardservices.com or www.priceless.com/travelrewards, registering card, and activating offer. Cash back will be earned in-store only. Not valid for online purchases. Please check the operating hours of the observation deck. Operating hours may vary slightly depending on the operating policy and weather conditions and changes may not be announced separately. For the safety of visitors there is a security screening before the entrance, please check 'Prohibited Items' on https://seoulsky.lotteworld.com/en/watch/attentively.do. The offer is not valid paying with other payment methods such as digital wallets and payment aggregators. If UOB Mastercard does not receive information that identifies your transaction as qualifying for the offer, you will not receive a statement credit. Statement credit may be reversed if qualifying purchase is returned/cancelled.