This cache replaces a multi which ended in the same location. You are looking for a small camo container. This isn't quite a park and grab, but it's pretty close.
Guppey Park was donated to the City of Dover by the Guppey family and is about 25 acres in total size. It includes an ice arena, softball field, picnic area, and outdoor pool. The 50-meter pool near you is named in honor of US Olympian Jenny Thompson. Jenny was born in Danvers, Massachusetts, but considers Dover her hometown. Between 1992 and 2004, she won twelve Olympic medals (the most ever awarded to an American woman) including eight golds, three silvers, and one bronze. As of 2016, Jenny works as an anesthesiologist in Portland, Maine. The park has lots to explore, including an indoor ice skating rink, a pavilion with picnic tables, a large field for running or playing Frisbee, a ball field (on the lower half), and more. And be sure to visit Duston's Market across the street for great bakery items and subs!