View of the Vltava River and ancient clock tower, Prague, Czech Republic, Europe

photography colour colour image color color image vertical vertical image outdoors outside day nobody no one no one travel travel destination travel destinations tourist destination city cities cityscape vltava river unesco unesco world heritage site world heritage site prague czech republic europe european river water building exterior building buildings architecture architectural history historical historic heritage urban scene urban scenes urban skyline elevated view medieval cloud clock tower tower landmark landmarks famous well known well known