passau, germany 2.2.2023. passau city, lower bavaria fortress niederhaus upon the river danube.

reflection river water sky waterway sea landmark cloud town coast city tourism skyline building canal vacation passau lower bavaria fortress niederhaus danube panoramic view castle veste antique germany 2023 viking cruise three rivers historical buildings ancient european travel destinations fortifications famous place local season touristic travelling tower hill attraction german medieval outdoors inn landscape urban history historic architecture europe cityscape bridge 13th century ilz culture 2 2 2023 danube city