The nearby Holbrook Island Sanctuary can be accessed by landing your dinghy at the isthmus and turning left on Indian Bar Road. You can download an information sheet called the Fresh Pond Interpretive Trail, and a trail map.
At the head of Smith Cove is the mill pond (see introductory photo). On Anne Powelson’s kayak trip there in 2014, she wrote this history of the mill: “Coming up on it at low tide, I could see the dam exterior was just small rocks. It looked like a simple do-it-yourself project: build a dam from nearby rocks and have free power provided by tides. But from the top, seeing the 10-15 foot width, made it apparent that this was no simple task, but represented hundreds of hours stacking rocks, not to mention designing the actual mill mechanisms. This dam once hosted a sawmill and a grist mill capable of grinding one hundred bushels a day; it could operate 16 of 24 hours in the day. However, by the time an of 1868 Hydrographic Survey, it was idle.”