Nature is not angular and rigid and so architecture is also allowed to have round shapes. 
This is part of the Amsterdam Rai car park. Black and white makes this a very cool picture to hang on the wall because you keep wondering what exactly you are looking at and it does not bore you at all.
                                
 GarlicMarian Goossens
GarlicMarian Goossens Chapel on the hillMarian Goossens
Chapel on the hillMarian Goossens Make a wishMarian Goossens
Make a wishMarian Goossens Round shapes in ArchitectureMarian Goossens
Round shapes in ArchitectureMarian Goossens Curves in architecture are so beautiful!Marian Goossens
Curves in architecture are so beautiful!Marian Goossens Night in RotterdamMarian Goossens
Night in RotterdamMarian Goossens Rotterdam skylineMarian Goossens
Rotterdam skylineMarian Goossens African ElephantMarian Goossens
African ElephantMarian Goossens African ElephantMarian Goossens
African ElephantMarian Goossens John Frost bridge ArnhemMarian Goossens
John Frost bridge ArnhemMarian Goossens