1. Washington, DC
The history, the government, the breathtaking architecture and inspiring monuments—you don't have to be a child to get an amazing education in this city. Our nation's capital is also known for its plenitude of museums—in fact, there are 44, second only to the Big Apple! If your kid enjoys visiting the National Air and Space Museum, imagine fostering his love of airplanes with trips to nearby Gravelly Point Park for front-seat views of the takeoffs and landings at Reagan National Airport. The Capital Crescent Trail, a hard-surface trail from Georgetown to Bethesda, MD, developed on an abandoned rail bed, is a great bike trip that is off the beaten track.
Family dinner nights are easy at quirky local favorites like Matchbox restaurants or Bu*****oys & Poets—both provide a place adults and kids can enjoy. And, of course, any child growing up in Washington, DC, will have a special place in his heart for the famous cherry blossoms and festival held each spring.
Here is the link-
http://www.parenting.com/gallery/2011-best-cities-to-live?pnid=381614