the pena national palace with a mix of architectural styles, located on the hilltop of sintra mountains, portugal

architectural architecture romanticism renaissance penaferrim incredible mountains manueline beautiful national portugal building heritage medieval exterior stunning landmark mountain historic vacation located hilltop palacio islamic amazing wonders foliage tourism holiday leisure palace styles sintra europe castle unesco gothic yellow unique exotic autumn cloudy travel pedro world clock tower color seven visit pena site dome yard fall mix sao neo