Blue tiles (Azulejos) on exterior of Chapel of Santa Catarina (Chapel of Souls), UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

porto blue tiles azulejos unesco site cultural heritage visitor architecture southern europe portugal historical site ornate design norte region european landmarks sightseeing history travel tourism exploration portuguese culture 19th century beautiful decoration religious site urban stroll heritage picturesque architectural beauty culture spirituality mural tourism highlights local attractions charm serenity craftsmanship unesco heritage iconic site european architecture classical tilework mosaic tiled facade coastal city local culture enchanting details spiritual journey tourist attraction art decoration walking streetscape city