What about a stroll in the park? The place is very nice. The lawn is very good and there are many people walking their dogs there. There are also many trees to offer shade in a hot day.
It is an amazing lake for a picnic, Walking around and simply making a jogging. It is localized in the core of the city with ease access. It is worth to visit this place in Londrina.
Nice place to run/bike everyday, specially nice on weekends! On Sundays no cars drive around the lake, so it is great to go with the kids.
A beatiful place to walk/jog around on early morning, when people are working out. The only sad thing is that there is not much to do around, such as having a breakfast or lunch.