If you only get one stop alone in Detroit, make it Belle Isle (985-acre island, free on foot or bike). Next on our list are Detroit Riverwalk (open daily 6am-10pm, 4+ miles) and Michigan Central Station (lobby open daily 8am-5pm); the other three, down to Motown Museum, are below with where to book.
guided tour only, adults $20
adults $20, open till 9pm Fridays
Saturday Market, year-round 6am-4pm
lobby open daily 8am-5pm
open daily 6am-10pm, 4+ miles
985-acre island, free on foot or bike