Book a central stay at this hip, ten-floor, five-star address. Overlooking Rotterdam’s oldest harbour with its vintage barges, the aluminium and glass frontages of Mainport present a stark contrast to its surroundings. Inside, there’s artsy wallpaper themed on the world’s continents, clean lines, moody colour palettes and refined furnishings. The ‘Spa Heaven’ has two treatment rooms, two hammams, a sauna (with a view), a steam room – and around half of the 215 bedrooms even have their own private saunas. Guests can sip cocktails on the hotel’s swanky riverside terrace and dine at the open-plan restaurant. With extensive meeting facilities, Mainport is an excellent choice for the business traveller and tourist alike.