Roof top infinity pool illustration

Quick answer：

An infinity pool is a swimming pool that appears to have no boundary, giving the illusion of merging with the horizon. This is achieved by carefully designing the pool's edge to align with the horizon line. Illustrations of such pools often show a sleek, modern design with a seamless transition from the water's surface to the surrounding landscape. These pools are popular for their aesthetic appeal and the sense of tranquility they provide.