Longwood Gardens is located about thirty miles southwest of Philadelphia, in Kennett Square, Pennsylvania. It’s open from 9:00 A.M. to 5:00 P.M. usually and 9:00 A.M. to 6:00 P.M. during the summer (as well as many evenings for fountain displays and holidays). Once you’re there, guided tours are available, or you can pick up the excellent self-guided tour book. Additional information is available from the visitors’ center (215-388-6741).