Detroit, known for its rich musical heritage and automotive history, offers numerous free attractions for visitors of all ages.

For Kids:

1. Detroit RiverWalk: Features playgrounds and green spaces along the Detroit River.
2. Belle Isle Park: Home to a nature center, aquarium, and conservatory (all free).
3. Detroit Institute of Arts: Free for residents of Wayne, Oakland, and Macomb counties.

For Adults:

1. Eastern Market: Historic public market with local vendors and street art.
2. Campus Martius Park: Urban park with free events and concerts.
3. Detroit Historical Museum: Free admission (donations suggested).

For Both:

1. Dequindre Cut Greenway: Former railway line turned into a recreational path.
2. Guardian Building: Art Deco skyscraper with stunning architecture.
3. Lincoln Street Art Park: Outdoor sculpture park and community space.