Geomunoreum

거문오름

The volcanic cone that made the caves on this side of the island: lava from here ran about 14 km to the coast and left the Geomunoreum Lava Tube System behind it. In front of the cone a collapse trench runs about 2 km long, 80 to 150 m wide and 15 to 30 m deep, thought to have formed where cave roofs fell in. There are three routes of different lengths, two of which may only be walked with a guide. Eleven departures a day, fifty people each, and booking closes at 17:00 the day before.

Language

The crater of Geomunoreum seen from its summit on a clear day, forested slopes dishing inward.

Place information

Korean name: 거문오름
Address: 569-36 Seongyo-ro, Jocheon-eup, Jeju-si, Jeju
Opening hours: Otherwise 09:00 (every 30 min) (11 a day) (last entry 14:00) World Heritage guide service 09:00–17:00
Closed: Every Tue (a rest day for the site itself) · Seollal · Chuseok
Hours notes: These are not opening and closing times but the span of departures, and that 14:00 slot is the last one you can join. Fifty people per departure. When you come out depends on which route you took, and the operator states that as a duration rather than a time. In bad weather the site closes completely.
Booking: The Geomunoreum walk required Booked by telephone or online, from 09:00 on the first day of the previous month until 17:00 the day before. The 13:30 and 14:00 departures do not allow the full course or independent walking. Arrive 10 minutes before the booked time to buy a ticket and check in, and collect the entry pass at the visitor information centre.
Time needed: Half day
Admission: ₩2,000
Operated by: Jeju World Heritage Office

Official site

Prices

Adult	₩2,000The same table lists exemptions: under-6s and over-65s, Jeju residents, national merit holders, disabled visitors, basic-livelihood recipients, and 4·3 victims and their families, among others.
Youth(youth and soldiers)	₩1,000
Child(children)	₩1,000
Group (10 or more) · Group(groups of 10 or more, adult)	₩1,600
Group (10 or more) · Group(groups of 10 or more, youth and soldiers)	₩800
Group (10 or more) · Group(groups of 10 or more, children)	₩800

Source: Jeju World Heritage Office — Geomunoreum. Walks depart 09:00-14:00 every thirty minutes, eleven a day, fifty people per departure; closed every Tuesday as a rest day for the site, and on Seollal and Chuseok themselves; closed completely in bad weather. Booking by phone or online until 17:00 the day before. Admission 2,000 won adult (1,600 group), 1,000 youth/soldier (800), 1,000 child (800); groups from 10, with a separate list of exemptions. Three routes: the summit course (unaccompanied, about 1.8 km, 1 hour), the crater course (with a guide, about 5.5 km, 2 hours 30), and the full course (about 10 km, 3 hours 30). The collapse trench is about 2 km long, 80-150 m wide and 15-30 m deep. · Sep 25, 2026

What to see

Collapse trench

The collapse trench, also called the ‘lava gorge’, extends north-north-east.

Nearby

Secret Forest

A walk through cedar west of Andol Oreum, with tickets sold from a mint-coloured truck at the entrance. The unpaved loop takes about half an hour and has eight marked spots to photograph, with a stand of hinoki cypress partway round. Closures are posted on the operator's Instagram rather than following a fixed calendar, which is worth checking before driving out here.

Bijarim Forest

Two loops split at a crossroads inside the wood. Course A is about 2.2 km of level volcanic-cinder path, 40 minutes to an hour, and takes a pushchair or wheelchair with help on the slopes; course B includes rough stone and does not. Dogs are not admitted, which separates this from most Jeju walks.

The lava column at the end of the open section of Manjanggul, lit in the dark and rising from floor to ceiling.

Manjanggul Lava Tube

A lava tube about 7.4 km long whose main passage runs 18 m wide and 23 m high. Roof collapses left three entrances; visitors may use only the second, and may walk 1 km in from it. At the end of that kilometre stands a lava column about 7.6 m high, said to be the largest known anywhere, and that column is also where you turn round. The operator files this cave as partly open — the other caves inscribed with it are closed to the public altogether.

Gate 7 of Jeju Dongmun Market, the market's name and the gate number on the arch above the entrance, with crates of tangerines stacked at a stall in front of it.

Jeju Dongmun Traditional Market

Jeju's largest and oldest market, trading on this block since 1945. Produce, seafood and dried fish fill the daytime aisles, with tangerines and omegi-tteok rice cakes worked in between them. In the evening a separate night market opens by gate 8 and closes when the ingredients run out. There are twelve entrances, so agreeing a gate number is the difference between meeting someone here and not.

Stories about this place

Four Places to Visit in Eastern Jeju: Hours, Entry and What to Check
What four very different east Jeju places are like — a lava tube, a volcanic cone you must book, a cedar forest and a coastal headland — who each one suits, and what to book or check before you set off.
One Day in Eastern Jeju: Geomunoreum, Manjanggul, Bijarim and Seongsan
A west-to-east route through four east Jeju sights, built around the one booking that must be made the day before, the three monthly closures that break it, and where to shorten the day if you start late.

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