Antique Real Photo Postcard. Megunticook Lake from Hope Road in Mid-Coast Maine. Photo by Frank Blodgett. Divided back, postmarked 1910. Condition: Very good condition. Comments: Megunticook Lake is a body of water in Knox County, Maine. Parts of the lake are located in the towns of Camden, Hope and Lincolnville. Covering 1,328 acres, it is the largest lake by both area and volume in Knox County. Megunticook Lake is very picturesque with the towering cliffs of Mount Megunticook rising from the east shore. The lake also serves as a public water supply for near by towns.