Eco Pod Retreat, Appin, Scotland

The Scottish west-coast environs may be wild and woolly, but there’s nothing rustic about these two geodesic domes, set on a 20-acre wooded escarpment just outside the seaside village of Appin. Each 750-square-foot, PVC-and-steel pod resembles a Martian space probe that’s hurtled to earth; inside, the mid-century-mod furnishings include Ligne Roset sofas, Eames recliners, modular kitchenettes, cedar soaking tubs and high-efficiency wood pellet biomass stoves for heating. The property overlooks Loch Linnhe and the Kingairloch coastline—including one of the most photographed landmarks in Scotland, Castle Stalker. Guests can explore Appin and the nearby town of Oban, sign up for a guided photography trek or take one of the daily ferries to surrounding islands, including Mull, Iona, Staff, Coll and Colonsay. Three-night stay, from $645; domesweetdome.co.uk.