Pure Detroit organizes tours all over the city, but you won’t find any better views than on their Downtown Skyscraper Tour. Led by historic preservationist and urban planner Michael Boettcher, the tour winds through the Guardian Building, an art-deco gem; the Penobscot Building; the First National Building and the GM Ren Cen, a contemporary masterpiece. There are dates all through November; see Pure Detroit’s full schedule.