Popple Island Wildlife Sanctuary is a 143-acre parcel that includes the western shore of Odiorne Pond. Roughly a quarter of the property is a wetland complex of open water, emergent, shrub swamp, and fen created by a series of beaver dams on the drainage from Odiorne Pond, from these wetlands emerges Lockes Brook, a very pretty and typical woodland brook. The majority of the Sanctuary is comprised of gently sloping hills covered with closed-canopy forests.