See the top attractions of the city at your own pace and without the hassle of figuring out how to get there. The double-decker Hop On/Hop Off Bus - passes available for one or two days - travels around the city on two routes, both originating at Catalonia Square. Stops include the Barcelona Cathedral, Camp Nou, the aquarium, Parc Güell, Sagrada Família and some otherwise hard to reach destinations like the Catalonian Archeology Museum. Buses pass by between 6 and 15 minutes, depending on the season, with each route taking about two hours. Commentary in 12 different languages as you travel between stops.