The Principal Madrid hotel is located at Madrid’s Gran Via in a 1917 corner building. It offers 76 rooms and suites designed with high ceilings, huge windows and iron railings. It is packed with a good mix of art and deco details while the interiors are styled up by designer Pilar Garcia-Nieto and Luzio, a Barcelona firm. To top it all off, the hotel comes with a rooftop terrace and bar, a wellness suite with gym and sauna, for a quick escape from the chaos of the city. Check out the hotel website here.