Cathedral against clear blue sky, Liebfrauenkirche, Trier, Germany

Cafe building against blue sky, Kurfurstendamm, Berlin, Germany

Palace against clear blue sky, Charlottenburg Palace, Berlin, Germany

Coltsfoot (Tussilago farfara) flowers against blue sky, Schleswig-Holstein, Germany

Low angle view of rusty cranes against blue sky, Germany

Low angle view of traditional windmill against cloudy sky, Australia

Low angle view of crane against blue sky, Bremerhaven, Germany

Church spire against blue sky, St. John's Church, Lunenburg, Germany

Close-up of st. Ansgar statue against blue sky, Hamburg, Germany

Lodge against blue sky, Lancken-Granitz, Rugen island, Mecklenburg-Western Pomerania, Germany

Clock tower against blue sky, St. John's Church, Lunenburg, Lower Saxony, Germany

Traditional windmill on grassland, Mecklenburg-Vorpommern, Germany

Traditional windmill against blue sky, Germany