Dolder Grand (Zurich, Switzerland)
Located in Zurich, but set far enough away from the bustle of the city to feel more like a remote retreat, the Dolder Grand has enjoyed its perch above the city — complete with spectacular views of the skyline, Lake Zurich, and the Alps — since 1899. Still, in 2004 the hotel decided it was time to revamp and following a four-year renovation came back even stronger with a host of forward-thinking changes, including brand-new spa and golf wings and pioneering geo-thermal energy concept. Among its most impressive improvements is a stunning, 124-piece art collection of works from the likes of Andy Warhol, Salvador Dali, and Henry Moore. In order to help guests navigate and fully appreciate what they're seeing, there's a special app that will guide them through the collection (an already-loaded iPad is available at the front desk).