Abstract: A floating solar pond includes a reservoir of an aqueous solution having a predetermined density, and structure for enclosing a body of solution and segregating it from the reservoir. The enclosed solution has an average density less than the density of the solution in the reservoir thereby causing the surface of the enclosed solution to be higher than the surface of the reservoir whereby a normal pressure is exerted on the hull in a direction outwardly therefrom and the hull is under tensile stress. Preferably, the hull is asixymmetrical and a co-axial pile, anchored to the bottom of the reservoir, constrains the hull by means of radially extending members connecting the pile to the hull. The pile is hollow and contains conduits through which heated brine passes to a power plant built on the pile.