Ford Field Park at 22051 Cherry Hill Street, Dearborn, Michigan.

Awesome park in the middle of Dearborn. Playgrounds, ponds, pavilions galore. I'm the summer it hosts Homecoming, a massive carnival and community event with food, music, and rides. Plenty of areas for everyone to find a table in the nice months. In the winter you'll find few places busier, as kids from all over come to sled the hills that make up the southern part of the park. Nice bridge crossings over the Rogue and a trail that's walkable even at night. Bathrooms on site open most of the year.