Jeju

An island made by volcanoes

Almost all of Jeju's land came from volcanoes. Runny basalt lava from the small volcanoes around Hallasan flowed toward the coast again and again, leaving the island's gentle slopes. That's why the first thing you notice anywhere is black stone full of tiny holes. Field boundaries, the walls around graves, the walls around houses — all built from it. In 2007, Hallasan, Seongsan Ilchulbong and the Geomunoreum lava tube system were inscribed together as a UNESCO World Natural Heritage site. A summit crater, a peak that rose from a shallow sea, the underground paths of lava: the different stages of a volcanic island's making are all still here, on one island.

Hallasan — the summit and Witse-oreum

Only two trails reach Baengnokdam, the summit crater: Seongpanak (9.6 km, about 4.5 hours one way) and Gwaneumsa (8.7 km, about 5 hours). The crater itself is unusual — its western half is trachyte, its eastern half basalt. If the summit feels like too much, take the Yeongsil trail. From the Yeongsil rest area it's about 3.7 km and an hour and a half to Witse-oreum (the trail carries on to the Nambyeok junction, 5.8 km in all). You pass rock cliffs lined up like a folding screen, then the trees shrink and a high plateau suddenly opens out. Hallasan's forest changes with height: evergreen broadleaf up to 600 m, deciduous broadleaf up to 1,400 m, and subalpine plants above that. Around 2,000 of the roughly 4,000 plant species that grow in Korea live on this mountain.

The east — a sunrise peak and the path of lava

Seongsan Ilchulbong, 180 m high, formed about 5,000 years ago when hot magma met water in a shallow sea and exploded, piling up ash. From the top, a bowl-shaped crater opens below your feet, with Udo across the water. Inland, lava erupted from Geomunoreum several times and ran downhill about 14 km to the coast, leaving caves underground. Manjanggul is one of them — about 7.4 km in total, though only 1 km from the second entrance is open to walk. At the end stands a lava column about 7.6 m tall, said to be the largest of its kind in the world. After a rockfall near the entrance in December 2023, the cave closed for repair work and reopened on May 30, 2026. Geomunoreum is climbed in booked slots, following a guide along forest paths: about an hour for the summit course, two and a half hours for the crater course, three and a half for the full course. Slots leaving at 1:30 p.m. or later can't do the full course.

West and south — water and cliffs

The west coast faces the setting sun, so it's the place to be toward evening. The little island of Biyangdo sits off Hyeopjae Beach, and shallow water spreads over white sand, turning the sea a pale jade. The southern coast around Seogwipo feels different again. Yongmeori Coast, below Sanbangsan, is Jeju's oldest volcanic body, formed by hydrovolcanic eruptions in shallow sea long before Hallasan. Its layers, cut back by the sea, run on like stacked pages. Its opening hours shift with each day's high tide and the weather, so check the Seogwipo public attractions Instagram (@6sot_official) before you go. On the Daepo coast in Jungmun, hexagonal stone columns stand against the surf. The Jeju Olle trail follows this shoreline, so even one section takes you back and forth between village lanes and rocky seaside paths.

Haenyeo and a table set by the sea

Jeju's coastal villages still have haenyeo, women who dive without breathing equipment. Some are in their 80s. They hold their breath for about a minute at a time, go as deep as 10 m and come up with abalone and sea urchin. The whistling breath they let out as they surface is called sumbisori. Jeju haenyeo culture was added to UNESCO's Intangible Cultural Heritage list in 2016. So the sea reaches the table first: seaweed soup with sea urchin, thick cuts of silver hairtail braised in their sauce, golden grilled tilefish. Pork matters just as much. Gogi-guksu is thick noodles in pork-bone broth topped with boiled pork; momguk is that broth simmered with gulfweed; and black pork is grilled and dipped in melchot (anchovy jeotgal), warmed right on the grill. Dongmun Market in Jeju City and Seogwipo Maeil Olle Market put these dishes and seasonal tangerines in one place.

Remembering 4·3

It began with a police shooting on March 1, 1947. On April 3, 1948, armed insurgents of the Jeju branch of the South Korean Workers' Party rose up. Until the restricted zone on Hallasan was fully reopened on September 21, 1954 — seven years and seven months in all — 25,000 to 30,000 islanders were killed in armed clashes between insurgents and counterinsurgency forces and in the suppression that followed. This is what Jeju calls 4·3. At Jeju 4·3 Peace Park in Bonggae-dong, Jeju City, a memorial records victims' names and their ages at death, and 4,138 markers for those whose bodies were never found stand in rows across a field. The memorial hall is free and closed on the first and third Mondays of each month. After a visit, the villages you passed between oreum and coast start to look a little different.

A 4-day itinerary

Day 1 — Land at Jeju International Airport → gogi-guksu at Dongmun Market → Jeju 4·3 Peace Park → head east and stay near Seongsan Day 2 — Morning at Seongsan Ilchulbong → Geomunoreum (book a morning slot) or Manjanggul → Udo in the afternoon → black pork dinner Day 3 — Yeongsil trail to Witse-oreum (or an early start for the Seongpanak summit hike) → Sanbangsan & Yongmeori Coast (check that day's hours) → sunset at Hyeopjae Beach → stay in the west Day 4 — Daepo columnar joints → Seogwipo Maeil Olle Market → Jeju International Airport

What to eat

• Black pork BBQ (dipped in melchot anchovy sauce)
• Gogi-guksu (noodles in pork-bone broth, topped with boiled pork)
• Braised hairtail · grilled tilefish
• Momguk (pork soup with gulfweed)

Handy tips

• The two trails to Hallasan's summit crater, Seongpanak and Gwaneumsa, need a booking in advance. There are no shops on any trail, so bring your own water, snacks and rain gear.
• Trunk and local buses cost a flat 1,150 won by card (1,200 won cash), whatever the distance, and you get transfer discounts up to twice if you board again within 40 minutes of tapping off.
• Plan the east around closing days. Geomunoreum is booked first-come from 9 a.m. on the 1st of the month before your visit and is closed every Tuesday. Seongsan Ilchulbong closes on the first Monday of each month, Manjanggul on the first Wednesday.