An infinity pool, also known as a negative edge pool or zero-depth pool, is a swimming pool that appears to have no edge when viewed from a certain angle, creating the illusion of water extending to the horizon. These pools are often located on the rooftops of high-rise buildings and offer breathtaking views. The term 'picture collection' refers to a collection of images or photographs, typically showcasing the various designs and installations of such rooftop infinity pools.