i am in walking distance of both Petsmart, Homedepot and the previously mentioned landscaping place....but my little secret is Devereux Beach in Marblehead the rocks are beautifully shaped, beautifully colored and free
The only south facing beach on the North Shore... great place. Lots of shale and sedimentary, you've got to soak the pants off of it for freshwater use however.
On the neck there is a small pond you can hike to, that has several sizable snapping turtles and some very large red carp. The turtles are human savvy so you have to lay in the grass for them to come up.