Gwaneumsa Temple

Hallasan National Park

Choose the trail before planning transport: only Seongpanak (9.6 km) and Gwaneumsa (8.7 km) reach the summit, both need an advance reservation, and both turn walkers back at a mid-mountain control point if they arrive after the cut-off. Every other trail is a half-day walk with no summit at the end of it.

Halla Arboretum

A provincial arboretum in Yeon-dong on the Jeju City side of the island, at the foot of Gwangi Oreum beside Route 1100, planted with Jeju natives and subtropical plants. Its outdoor grounds and paths stay open all year. The grounds reach up to the summit of the oreum, which makes this one of the few places a traveller staying in Jeju City without a car can see volcanic ground and island vegetation.

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.

Geomunoreum

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.