South Korea
Squid-boat lights burn at night around an island that is nearly all cliff.
The ferry punches through East Sea swells for hours before the island materialises: sheer volcanic cliffs, no beaches, squid-drying racks, a caldera lost in cloud. This is Korea with the softness removed.
Ulleungdo stands 130 kilometres off the east coast, the eroded stump of a volcano whose basalt walls drop straight into deep water, with the collapsed Nari Basin holding the island's only flat farmland. Coastal roads tunnel through the rock, squid boats light the night sea around the island, and endemic trees survive here and nowhere else. Ferries cancel readily in rough water, which shapes every plan, and on clear days the Dokdo islets show on the horizon.
Solo
Build each morning from the sailing and trail notice, retaining the freedom to switch between caldera and coast.
Friends
A small group can pool island transport costs and keep one another steady on remote, exposed paths.
Honghapbap, the island's mussel rice, is the harbour lunch.
Barnacle kalguksu is the other signature, noodles in a broth of the shoreline.

Mount Kenya
Kenya
Equatorial glaciers cling to Africa's second-highest peak above a forest of giant lobelias.

Sfakia
Greece
Rebel gorges and fortress villages clinging to cliffs above the Libyan Sea — Crete's wildest coast.

Chapada das Mesas
Brazil
Mesas to the horizon, and a seventy-metre fall past a rock they read as the saint.

Canyon Guartelá
Brazil
A river that refused to go around cut Brazil's longest canyon dead straight for thirty kilometres.

Baengnyeongdo
South Korea
White quartzite cliffs stand twelve kilometres from North Korea's coast.

Gageodo
South Korea
Cliffs of two hundred metres guard South Korea's southwesternmost inhabited island.

Heuksando
South Korea
The island's signature dish is fermented skate strong enough to make grown eaters gasp.

Cheorwon
South Korea
Red-crowned cranes winter by the thousand on the border's rice plain.