With it's rolling hills, sprawling playground and sweeping views of the Boston skyline, Robbins Farm is a true Arlington treasure...
patch.com
This is a great, huge park/playground. During the summer you can find people flying kites almost all the time. The playground for kids is amazing. Stuff to do for all ages and the highlight are two side-by-side 50 foot slides. Lots of shade.
kaboom.org