This is such a great place to stop - I just wish we'd had more time! We took a ferry to visit Suomenlinna, which was a fortress built to defend the city (but didn't seem to do that all the time based on our tour guides comments). It is a pretty place to explore, very colorful, lots of history. I stuck my foot in the Baltic Sea here (soooooo cold) and we found two geocaches.
Hauta - Tomb
The first photo is Lesley and I close to the water right before I stuck my foot in.