If you want to live where you are physically two years younger than your chronological age, try Raleigh-Durham. According to a recent study by RealAge, the metro area made the list of "youngest" cities in the nation. The factors that contributed to this fountain of youth? 1) Getting the right amount of sleep. 2) Not smoking. 3) Being physically active. 4) Controlling your blood pressure. To experience Raleigh-Durham, check out our listing of 77 assisted living facilities in the area. From Raleigh's city center to Durham's is about 28 miles. Their physical boundaries intersect each other along I-40. And both cities share parts of Wake and Durham counties.