U Retreat

Concrete and glass structures rise out of a wooded valley in remote Hongcheon-gun, looking less like a boutique resort and more like a film set someone forgot to strike. Guest rooms go floor-to-ceiling glass toward dramatic cliffs and a mountain stream, with interiors that are white, minimalist, and spa-quiet, each with a soaking tub and a sleek kitchen. An outdoor infinity pool, open-air spa, and a wine bar on the terrace round things out for anyone who came to be alone, beautifully.