Jeongdong Observatory on floor 13 of Seosomun Annex Building 1 overlooks Deoksugung Palace and the Jeongdong area. Seoul's 2026 guidance lists Monday–Thursday 13:30–17:30, Friday 13:30–22:00 and Saturday 09:00–22:00; winter night visits end at 21:00. Check separate café hours and access restrictions.