halfway up the mountain, edgeless swimming pool illustration

Quick answer：

An edgeless swimming pool, also known as a zero-edge pool, is a type of swimming pool designed with no visible barrier between the pool and the surrounding landscape. The pool appears to extend seamlessly into the environment, creating a visually stunning effect. Illustrations of such pools often show them integrated into natural settings, like the halfway point on a mountain slope, emphasizing the harmony between the water and the surroundings.