Rent4Days Apartment Rental Agency has the greatest selection of vacation and corporate apartments in Barcelona, Madrid and Lisbon for short- and long-term rent. We offer a wide variety of self-catering holiday accommodation and stylish serviced apartments either in the historic city centre or close to places of interest. We have apartment rentals to suit everyone: cheap flats, cosy studios, beach apartments with a sea view, penthouses with a roof terrace, loft apartments and luxury flats.