Jeju Island South Korea

Jeju Island: South Korea’s Volcanic Escape

The Seoul-to-Jeju air route has been one of the busiest domestic flight corridors on Earth for years running, and yet most international travelers treat the island as a footnote. That is a mistake. Jeju is South Korea’s largest island, home to roughly 1.5 million people, with a dormant shield volcano at its center, lava tube caves, black sand and white sand beaches, and tangerine orchards covering the hillsides in autumn. The culture is distinct enough from the mainland that the island maintains its own language, Jejueo, now spoken by very few but still formally studied and documented. Tourist infrastructure is solid, English signage has improved substantially in recent years, and getting around without Korean is more manageable than it was even five years ago.

Hallasan National Park

Hallasan, at 1,950 metres, is the highest peak in South Korea. An extinct volcano with a crater lake at the summit, it dominates the island’s geography in every direction. Several hiking trails lead to or near the top: the Seongpanak and Gwaneumsa trails both reach the summit crater (Baengnokdam), while the Eorimok and Yeongsil trails make for excellent half-day hikes on the western slopes without the full summit commitment.

Go early. Summit trails have enforced cut-off times: rangers will turn you back if you have not passed a certain checkpoint by roughly midday, and the times shift by season. The Gwaneumsa trail is the most scenic of the summit routes but considerably more demanding than Seongpanak. Carry more water than you think you need. The mountain is exposed and the ascent on a warm day is genuinely taxing.

If you want a strong opinion: Yeongsil is underrated and, on a clear day, gives better views for half the effort.

Manjanggul Lava Tube

One of the longest lava tube cave systems in the world, Manjanggul was formed when a lava flow cooled and hardened on the outside while the molten interior continued flowing, leaving a hollow tunnel roughly 13 kilometres long. About one kilometre of that is open to visitors, lit and fitted with a formed walking path. At the far end stands a lava column roughly 7.6 metres tall, among the largest lava stalagmites known anywhere on Earth.

The cave sits in Gimnyeong on the northern coast, takes around 45 minutes to walk through at a relaxed pace, and is part of the Jeju Volcanic Island and Lava Tubes UNESCO World Heritage Site designation. Entry is around 4,000 KRW for adults, making it one of the better-value sights on the island. It also stays a steady cool 11 degrees Celsius inside, which on a hot summer day feels like the best reason to visit.

Seongsan Ilchulbong (Sunrise Peak)

A tuff cone formed from an underwater eruption approximately 100,000 years ago, Seongsan Ilchulbong rises 182 metres above the eastern tip of Jeju. The crater bowl at the top is roughly 600 metres across, filled with grass rather than water, and the rim offers one of the best views on the island: sea stacks below, open ocean, and on a clear morning the light doing something genuinely worth waking up for.

You can hike from the base in about 20 minutes on a paved path. The sunrise crowds are real: the car park fills before 5am on clear summer mornings. A mid-morning weekday visit gives you the views without the jostling. The haenyeo diving performances near the base, organised for tourists, are a bit theatrical, but they do give a sense of the scale and physicality involved.

The Haenyeo

Jeju’s haenyeo are the female free divers who have worked the coastal waters for centuries, diving without equipment to depths of 10 metres or more to harvest abalone, sea urchin, conch, and seaweed. Several thousand remain active, though the tradition is in gradual decline as younger generations pursue other work. UNESCO recognised haenyeo culture as an Intangible Cultural Heritage in 2016.

Watch them work from various points along the coast, particularly around Udo Island and near Seongsan. The Haenyeo Museum in Gujwa is small but competently curated and covers the history and techniques without excessive romanticism. Haenyeo-run seafood restaurants sell the day’s catch directly. Abalone porridge, jeonbok juk, is the traditional Jeju breakfast and the best version you will eat will almost certainly be from one of these small harbour-side places.

Food Worth Seeking Out

Heuk Dwaeji (black pork) is Jeju’s most celebrated local ingredient. The black Jeju pig has a different fat composition and a more pronounced flavour than mainland Korean pork. Thick-cut pork belly, samgyeopsal, grilled over charcoal and eaten with doenjang paste and fresh vegetables is the standard. Jeju City’s black pork street, Heuk Dwaeji Geori, has concentrated the best options in one walkable strip. Plan to spend around 20,000 to 30,000 KRW per person for a proper meal. Go hungry.

Galchi jorim, spicy braised hairtail fish, is a Jeju staple and the kind of dish that tastes best eaten fast while it’s still sizzling. Jeonbok juk, abalone porridge, is richer and more umami-forward than it sounds, especially versions made with haenyeo-harvested abalone. Hallabong tangerines and their hybrid cousins are in season October through spring and sold cheaply from roadside stalls. They are noticeably better than anything you will find in Seoul.

Getting Around

A rental car is the practical choice. The island takes about an hour to cross on the fast road, and the main sights are scattered around the circumference. Public buses connect major attractions but on infrequent schedules that will frustrate anyone trying to see more than one or two things per day. Jeju Airport has all the major rental companies; book in advance during summer when inventory runs short and prices spike. As of 2025 and 2026, all Jeju buses accept contactless Visa, Mastercard, and major mobile pay platforms, and KakaoMap or Naver Map navigate the island well. Google Maps is unreliable in South Korea.

Bus single rides cost around 1,300 KRW with a T-Money card, if you prefer not to drive. A taxi from Jeju Airport to Seogwipo on the south coast runs 35,000 to 50,000 KRW depending on traffic.

Where to Stay

Jeju City on the north coast has the widest range of accommodation, from international chains to small guesthouses and Airbnb properties. The western coast around Hallim and the southern coast near Seogwipo are quieter and better positioned for different sets of attractions. If you are primarily here for hiking Hallasan and exploring the natural sights, staying outside the city is the better call.

Budget minbak (private homes with guest rooms) are common and cost significantly less than hotels, typically 40,000 to 70,000 KRW per night. For mid-range comfort, the Seogwipo area has several well-located resort hotels with sea views. Spring and autumn are the best seasons: temperatures are manageable, the tangerine orchards are either in bloom or heavy with fruit, and the crowds are thinner than July and August.