The Yaksa-dong Embankment exhibition at 22-28 Jongga 14-gil, Jung-gu, Ulsan displays the structure of an ancient irrigation embankment from the late Three Kingdoms and early Unified Silla period. KTO's March 11, 2026 update explicitly lists closure every Saturday, Sunday and legal holiday; weekday hours 09:00–18:00, final entry 17:30, free admission. It also records one accessible parking bay, an entrance ramp and manually operated door, elevator and accessible toilet on floor 1. Place it on a weekday itinerary rather than assuming it opens like an outdoor park.