Won Daegutang

War Memorial of Korea

Closes at 17:40, not 18:00, and stops admitting visitors at 17:00 — a 40-minute gap that catches people who arrive after an afternoon elsewhere. Closed Mondays, and when a holiday falls on a Monday the closure moves to the day after, which is the rule most itineraries miss.

National Museum of Korea

Two closure rules, not one, and they are not the same thing: the museum itself shuts on only three days a year, while the permanent galleries take a quarterly Monday off with the garden still open. Wednesday and Saturday run to 21:00 — the only evenings you can see this place without daylight pressure.

Ichon Hangang Park

A 10.2 km stretch of the north bank from Jungnangcheon Bridge at Geumho-dong to Mancheoncheon Bridge at Ichon-dong. Nodeulseom, the island under Hangang Bridge, is listed among this district's facilities — and the operator notes separately that the island's 120,462 m² is not counted in the park's own 922,185 m². The inline skating rink here covers 14,602 m², with a 400 m road track and a 200 m banked track.

N Seoul Tower

Time the visit around sunset if you want both daylight and night views, and plan the ascent separately from the observatory ticket.