Bacharach is one of the best-preserved medieval towns in the Rhine Gorge, a UNESCO World Heritage stretch between Rüdesheim and Koblenz. The town sits in a slight recess carved into the steep vineyard slopes — its name likely derives from the Latin for Bacchus's altar — and the setting is among the most romantic on the river.
The half-timbered old town is largely intact. The Marktplatz is framed by medieval buildings, the Gothic Werner Chapel stands as a roofless ruin on the hillside above, and Stahleck Castle (now a youth hostel with great views) commands the ridge. The town walls are walkable and give you good perspective on how tightly the settlement is packed against the river.
Bacharach produces Riesling from the steep Bacharacher Hahn vineyard. Staying a night lets you experience the town after the Rhine cruise day-trippers have left and the place belongs to itself again.