Blue sky over Prague waterfront, Czech Republic, Prague, Czechoslovakia

architecture blue sky building calm color image copy space czech republic day heritage horizontal nature no people outdoors peace photography prague river scenic view serenity sunny sunrise sunset tranquil scene tranquility travel travel destinations waterfront brook capital central europe central european color colour culture czech dark dawn daybreak daylight daytime dusk eu edifice eu europe european european union evening morning natural negative space night nightfall nighttime nite outdoor outside peaceful scenics serene setting sun sky structure sundown sunlight sunshine tranquil twilight water water front waterway white space