For many years, water has been an essential element for live and for the evolution of man. Countless examples throughout history present an interaction between this liquid element and man's way of life. In Roman times, the domus was built around a patio with a small pool, which became the centre of the house. However, with the passing of time, its original function as a place to collect rainwater has given way to another much more thought -provoking one, which contributes to improving people's life. Swimming pools, especially those found inside a home, such as the ones in this book, have become a popular feature for architects and designers, who see the creation of these spaces as a great ally fo their most innovative architectural projects.