The One Barcelona GL features a rooftop terrace and puts you just steps from Casa Mila. You can visit the spa to be pampered with deep-tissue massages, body wraps, or mani/pedis, and Somni, one of 2 restaurants, serves Mediterranean cuisine and is open for breakfast and dinner. Other highlights at this luxurious hotel include an indoor pool, a poolside bar, and a 24-hour fitness center. Fellow travelers say great things about the helpful staff. The property is just a short walk to public transportation: Diagonal Station is 4 minutes and Provenca Station is 9 minutes.