Hanko is one of the few places in Finland where you can actually hang on a proper beach. In the center of this Panorama picture you can see parts of the Port of Hanko where rather large ships load and unload goods basically all day and all of the night.
So while people are working nearby basically 24/7 you can enjoy a relaxing afternoon starring at the open sea, watching ships come and go every now and then, maneuvering between the small islands you see near the Port of Hanko.