Fore River Sanctuary in Portland has 10 or 11 caches along with a nice set of waterfalls. The trails are nice but can be a bit bugy at times. Another favorite is Evergreen cemetery Portland. This cemetery has duck ponds, and walking trails with several caches on them. The trails start at the back of the cemetery by the duck ponds. Across the street is Baxter woods with a few more caches to get.