After winning a whopping 23 Olympic gold medals over the course of five Olympics, Michael Phelps will retire and spend his days with his family in this 6,010 square-foot mansion just outside of Scottsdale, Arizona. The $2.5 million real estate purchase features five bedrooms, six and a half bathrooms, four fireplaces, a resort-style pool and a hot tub. Scroll through to see his lavish new digs!