Acropolis including Library of Hadrian columns, Athens, Greece, Europe

color image horizontal travel destinations travel outdoors day athens greece capital cities greece europe building architecture clear sky sky hadrian's library library old ruin past history ancient roman column support dome acropolis athens unesco unesco world heritage site classical ancient greek hill tree tzistarakis mosque mosque islam muslim place of worship religion art museum arts culture and entertainment museum of greek folk art no people nobody no one no person historic ruin ruins historical old ruins daytime columns pillar pillars travel destination tourist destination tourist destinations