On the Wadden Sea side of the island of Sylt, facing back to the mainland, is the historic village of Keitum, home to a number of classic Frisian farmhouses as well as the luxurious Severin’s Resort & Spa, a modern 95-room hotel in an authentic local style. The rooms and suites are antique-influenced but beautifully contemporary, and full of up-to-date comforts, while the spa is elaborate even by German standards. And there’s a premium placed on food and drink, from the fine-dining Tipken’s by Nils Henkel to the more casual Hoog, accompanied by a bar, a cigar lounge, and a wine cellar equipped for private tastings.