Kuningatarvuori Lookout Tower is a simple but rewarding Hanko viewpoint, giving a lift above the low peninsula landscape. From the top you can read the town's relationship with the sea: harbour, islands, villas, and the open water that makes Hanko feel different from inland Finland.
It is a short stop, but a good one in clear weather. Add it to a walk around town or the waterfront, especially if you want a quick orientation before choosing beaches or harbour cafes.