The German city of Konstanz, with its Swiss-side twin of Kreuzlingen, dominates the straits that open into the Bodensee. Though Kreuzlingen itself offers little of interest to travelers, Konstanz has a lovely, concentrated Altstadt (Old Town). It's easily accessible from the Swiss side, though your passport may be checked even if you pass on foot. Konstanz belonged to Switzerland until 1805; today the two border towns share the dominant German influence.
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