Following these alleyways up from the water, one soon experiences the old city of Gamla Stan, with cobblestone streets, tiny cafes and shops, and its lively, historic Town Square, where a cannon ball can still be seen lodged in the corner of a building - shot from the Danes, the Swede's primary adversary over the eons. There is also a still-working fountain here, with gargoyles watching the spouts. The square is associated with a major historical event, the so-called Stockholm Bloodbath.