I walk through this tiny park every day to and from work - it's a really nice little plot of grass right in the middle of the downtown area. There's a park and also a water park - it seems to be popular with the a lot of kids but personally I would never dip into the water park.
There's a farmers market here too every Thursday or something like that - a lot of local growers set up small tents here and sell cheese and breads. It's always a fun thing to check out.
It does get a little sketch, but I honestly think the homeless are more sketch looking than actually dangerous. Seems to be a popular hangout for the older, asian grandparent crowd too - saw a bunch of them passing around a diabetic blood glucose level the other day and comparing scores (sugar levels?).
Wouldn't wander into here at night but it's one of my favorite parts of walking home.