I thought it was:
1) Cut down all the trees and plant new, small saplings
2) Create paved walkways that are too narrow for both bikes and people, with no clear reason to use them
3) Install metal "exercise equipment" out in the blazing sun
Separately, I spent 10 years in the twin cities and my extended family lives there, and there's a lot of success stories there. Almost all of the lakes have a walking path ringing them. There's also the fact, joked about by most locals, that the Minnesota Zoo has nicer grounds (meaning you never see the animals) and costs money, while the Como Zoo is free and thus is always a popular spot. I think most people see the Como Zoo as one of the most successful "public parks" around.