Perlan: Reykjavik, Iceland

Built above a geothermal spring, Perlan serves a practical function -- storing the city's water tanks -- and the indulgent one of fine dining in its giant glass dome. Enter, and you're greeted by sweeping views of the deep-blue ocean and volcanic mountains surrounding Reykjavik. Get your fill of fresh local seafood such as sous vide smoked trout ($20) and, in autumn, a special wild game buffet ($73) of Icelandic delicacies like wild goose, reindeer, and puffin.