Rooftop of Antoni Gaudi's Casa Batllo building, UNESCO World Heritage Site, Barcelona, Catalonia, Spain, Europe

travel destination photography horizontal colour image casa batllo building unesco world heritage site barcelona catalonia spain europe roof outdoors building exterior architecture famous place day no people spanish culture international landmark architectural detail ornate creativity colour color image color outside tourist destination travel architectural nobody no one no one landmark place of interest unesco world heritage sites unesco world heritage site world heritage sites typically spanish traditional culture tradition traditional traditionally spanish