Explore Prospect Park by boat, for free

If you missed free summer kayaking in Brooklyn Bridge Park or are too skeeved out by free boating on Gowanus Canal (it is 90 percent guns, after all), you’ve still got one more chance to row-row-row gently: the Urban Rangers are hosing free “canoe adventure” that around the waters of Prospect Park on Sept. 18. Meets at the Audubon Center at 11am; the trip ends at 2. Kids 8 and older can take part too, and it’s first-come, first-served so get there early. For more info, visit Parks and Rec. For more Parks and Rec, visit this.