Royal Hainaut

A former royal hospital built by Louis XV, now a hotel in Valenciennes with the kind of bones most architects weep over: blue stone vaults, seven-meter ceilings, and a grand courtyard the suites look down onto. The spa sits in the original cellar, which gives the indoor pool a memorably dramatic setting. The Michelin Guide awarded it one Key. A useful base for exploring northern France, once you've been dragged away.