Jeju City hides its best value in plain sight: the national park charges nothing to enter, the coastal Olle trails are free forever, and Dongmun Market sells a full meal for the price of a mainland coffee. Here are three days that prove it.
The only national park in South Korea with no entrance fee. The Eoseungsaengak cone from Eoreumok is a 1.3km, 30-minute climb to a 1,169m crater rim with views over Jeju City and the sea. Buses 240 from Jeju City run to the trailhead.
A strip of neighbourhood baekban canteens west of the city where a set lunch — rice, soup, five or six banchan refilled free — runs ₩8,000-9,000. No English menus, no tourist markup, and the side dishes alone outvalue any airport food court.
A free black-sand beach 6km west of the centre with two horse-shaped lighthouses on the breakwater. Showers and changing rooms are free in summer, sunset over the water is the island's cheapest photograph, and bus 202 gets you there.
The 18km Route 17 is free and never ticketed; the Yongdam section between Yongyeon Pond and Doduibong is a flat 3km of black basalt cliff walkway with sea arches. Orange and blue ribbons mark the way, no guide needed.
Jeju's largest market, open 08:00-21:00 daily. Hallabong juice ₩3,000, omegi tteok rice cakes ₩5,000 a box, a paper cup of gimbap ₩2,500, and mandarin-stall samples that never end. Cash gets better prices than card.
The covered arcade behind Dongmun hides gogi-guksu stalls serving Jeju's pork-broth noodles for ₩7,000-8,000 — the same dish costs ₩12,000 in Seogwipo tourist restaurants. Portions come with free kimchi and broth refills.
The restored Joseon-era governor's office in the city centre costs ₩1,500 — the cheapest heritage site on the island. Gwandeokjeong, National Treasure No. 322 and Jeju's oldest building (1448), stands directly outside and costs nothing to see.
The blocks between Tapdong Plaza and the ferry terminal hold Jeju's densest run of guesthouses — dorm beds ₩18,000-25,000 with free breakfast and shared kitchens, walking distance to Dongmun and the airport bus stop.
A 148m volcanic cone 20 minutes' walk east of the port, free and open 24 hours. Stone steps climb through pine to a pavilion looking over Jeju harbour to Hallasan; the linked Byeoldobong ridge path adds a coastal cliff loop at no cost.
A 65m tuff cone above Dodu-dong with a rainbow-painted coastal wall below and planes banking overhead into Jeju Airport. The climb takes 15 minutes, entry is free, and Muleongsu spring at its foot still runs cold and drinkable.
Permanent-exhibition admission is free: haenyeo diving gear, Tamna kingdom relics, dolhareubang stone grandfathers and the island's volcanic geology across two floors. Open 09:00-18:00, closed Mondays, with free English audio guides.
A suspension footbridge over a freshwater gorge where lava cliffs meet the sea, free and floodlit until 22:00. The pool below was a Joseon boating spot for scholars; today it's the city's best no-cost night walk, 15 minutes from Yongduam.