Eight Places to Visit in Jeju, Compared: What to Check Before the Price

One museum costs 3.6 times Seongsan Ilchulbong and 18 times Udo. All four of the outdoor places together come to 11,000 — less than the single indoor one.

Udo's 1,000 is the island's marine-park admission only — the cost of the boat is not included.

If your group includes anyone in their early twenties or their sixties, check this before the prices.

• Seongsan Ilchulbong — an adult is 25 to 64. Youth and serving soldiers are 13–24, children 7–12.
• ARTE MUSEUM Jeju — brackets are set by year of birth, not age. Adult 1963–2007, youth 2008–2013, child 2014–2019, toddler 2020–2022, born 2023 or later free. Born 1962 or earlier is the 10,000 concession.

So a twenty-four-year-old pays the 2,500 youth rate at Seongsan Ilchulbong and the 18,000 adult rate at ARTE MUSEUM.

Jeongbang Falls uses a third scheme again — six and under, 65 and over, and holders of a disability card enter free, on production of ID. Three places, three ways of counting age.

• Seongsan Ilchulbong — the first Monday of every month. If that Monday is a public holiday the closure moves to the next day. The date changes month to month, so it is not a rule anyone guesses without a calendar, and of the eight conditions here it is the one that can write off a whole day.
• Hallasan National Park — you must book. The two summit routes, Seongpanak and Gwaneumsa, cannot be walked without a reservation, and bookings for a whole month open at 09:00 on the first working day of the month before. Trail opening is seasonal too: 06:00 in winter, 05:30 in spring and autumn, 05:00 in summer.
• Udo — the boat, and the car. Ten to fifteen minutes from Seongsan or Jongdal harbour. And from 1 August 2026 to 31 July 2029 outside vehicles may not be driven on the island — the exceptions are 16-seat charter buses, class-1 low-emission rental cars, accessible rental vehicles, and rentals for people staying overnight on Udo.
• Bijarim — no pets. That parts it from a good many of Jeju's other forest walks, so a party with a dog leaves someone outside. Food other than bottled water is not admitted either.
• Jeongbang Falls — sunset. Hours are 09:00–17:50 with last admission 17:30, but the operator writes that "viewing hours change with the time of sunset, and entry may be closed depending on weather".
• Osulloc Tea Museum — nobody says when summer is. It runs 09:00–18:00, and 09:00–19:00 in summer — but the operator never states which months summer covers. Nothing on the page lets you work out which of the two applies on your day.
• ARTE MUSEUM Jeju — your birth year. The section above. It runs 10:00–20:00 with last admission at 19:00.
• 9.81 Park Jeju — every attraction differs. 09:00–18:00 is the park's representative time, and the things inside it run to their own. Outdoor attractions can stop for weather, and the operator asks you to call before setting out.

For three of these, this site checked and the source itself has no answer.

1. Osulloc's summer range — two timetables, no boundary between them.
2. 9.81 Park's per-attraction times — a representative time only, no individual ones.
3. Hallasan's control times — the operator's page carries the same control table in two different versions. The two-season one puts the Seongpanak trailhead cutoff at 11:30 in winter (Oct–Mar) and 12:30 in summer (Apr–Sep); the three-season one puts it at 12:00 in winter, 12:30 in spring and autumn, 13:00 in summer. Both tables carry the same caption, and that caption names three seasons — so the two-season table contradicts its own heading.

None of the three was filled in by guessing. In Hallasan's case this site's own record had transcribed the two-season table, and it has been corrected to record the existence of both instead. Only the operator can say which one is current.