Infinity pools differ from conventional ones because they will have one or more sides which have a so-called zero edge. This makes the pool look like it is connected to whatever there is in the background. Some of the best infinity pools look like they go on forever because their zero edge faces the sea. Others form their own horizon with the sky. Of course, you can have an infinity pool built for you wherever you like, but the idea is to provide a really great view whether you are looking at the pool or are swimming in it.