“A lake is a landscape’s most beautiful and expressive feature. It is Earth’s eye; looking into which the beholder measures the depth of his own nature.” So said H.D. Thoreau in Walden, conjuring an image of human eyes peering intently into Earth’s eyes, and learning something profound in the process. Indeed, who among us hasn’t gazed into one of these watery eyes of Earth, into a lake’s mysterious depths, and had their souls stirred, their curiosity piqued?…