© B2 Boutique Hotel + Spa Hürlimann-Areal Zurich

The B2 BOUTIQUE HOTEL + SPA in Zurich may only be several years old, but the building in which it’s housed is 150 years old. The former Hürlimann Brewery complex includes retail shops, Google’s European engineering headquarters and this urban, modern hotel. But the Thermal Baths & Spa that sits atop the hotel is the crown jewel. It gives hotel guests special deals and access to an open-air, heated rooftop pool, allowing you to soak at sunset while enjoying stunning views of the city, the steeples of Old Town and the Alps in the distance. While in your bathrobe, take the spa-only elevator straight down to the medieval-looking cellar. The former barrel-filling room has been turned into a thermal bath, with myriad large soaking pools, each rimmed with wooden planks resembling large beer barrels. The water comes from a nearby mineral spring, and the baths include a multitude of massage nozzles, lounger benches and even underwater music. While most of the interior was gutted, the hotel’s 60 rooms and suites have an industrial yet tasteful decor, and the downstairs library-lounge features a collection of 33,000 books lining its 36-foot-high walls. Overhead hang huge chandeliers made from, yes, ­repurposed green Hürlimann beer bottles. From $350, www.b2boutiquehotels.com