The Harbour: Architecture and Symmetry
Perspective is the key. With the appropriate wide-angle lens, ordinary buildings lined up in a row or a lone cargo crane create a completely new structure in a photo. In Hamburg's harbour district, you can find opportunities to play with form and light at almost every turn.
This is also the case directly on the quay, with its perfectly lined-up ships that seem to be waiting for a group photo.
So keep your eyes open :-)