Source: Kuressaare TIK
Take a look at the aerial panorama (picture by Joel Tammet).
If you're here and visiting the castle then you'll probably stroll through the park. Ok but by no means a must see.
Beautiful Park near Castle, which is number 1 attraction in Kuressaare. Also walkable from City "Centre". Playground for kids and restaurants and terraces for adults. Definitely worth of visit, if...
Besides the castle, there is very little to it. Don't go when wet. Path is paved with stones though mud is getting through.