While we may be a bit biased, Belle Isle has a lot of cool things to do! Here is an interactive map that shows the different attractions ( i.e. aquarium, conservatory, Great Lakes museum) trails, beaches and garden you can check out while in the area. Many of these are free or based on a donations.
You can rent bikes from MoGo (using the app) or rental shops like Wheel House Detroit to explore the area and ride the Cut!
Right in the middle of Downtown Detroit, a cute little "park" with seating, music, and typically a couple of alcoholic drink options!