Why do humans love being by the water so much? It actually comes down to science. Water has an emotional value to people that is demonstrated by science.
Cottage Life said about water, "What we cottagers experience, as we swim, float, boat, or simply drink it in, literally or figuratively, is real in a neurochemical sense, in a psychological sense."
If you want to learn more, there was actually a whole book written on the subject! Blue Mind by Dr. Wallace J. Nichols would be a great book to pick up this summer as you relax by the lake.