…Lake Willoughby is regarded by many as just plain mystical. It’s formation is even the subject of spirited research, and research has continued to this day. My parents were Coastguardsmen, and as a young couple, went diving in this lake. This is no small feat. Lake Willoughby is one of the deepest lakes in New England, even though it’s so small. The reason for that is the bottom is incredibly craggy, and uneven. There is no true lakebed towards the center…. Just a field of large, rocky, stalagmite structures. Sonar imaging proves this. The true “depth” is not really known as a result, just approximations….