We were on a "busy" trip where we had planned to see a lot of things in a short time.
Well, the best made plans often go astray.... so some sights did not pan out and we were in Watertown with an afternoon to spare.
If you are there and have the time, then go to Thompson Park and have a picnic or walk around or just sit on a bench and enjoy the scenery. We did.
There are playgrounds if you have kids and even a small zoo.