If contrasts are your thing, then this hits the sweet spot. Find the right combination between location and attitude and you’ve got the unique world of pentahotel Vienna. With six floors and 117 rooms, and just around the corner from the historic city centre, penta jostles comfortably with the past, and brings its own ultramodern take on things. The design as you arrive, by the superbly skilled Italian architect Matteo Thun, is part restaurant and bar, part meeting spot and chill-out area. And it’s all very, very cool.