Catoctin Mountain Park, Maryland

You'll know you've hiked too close to Camp David, the 125-acre mountain retreat used by every president since FDR, when you're stopped, X-Files style, by armed secret-service agents. Dubbed Shangri-la by FDR and renamed by Eisenhower in honor of his grandson, Camp David is situated in a top secret location within Maryland's forested Catoctin Mountain Park , where camping, picnicking, fly-fishing, and cross-country skiing welcome presidents and civilians who come to escape the sweltering heat of Washington, D.C., 60 miles to the southwest. Get as close as possible to one of the most storied destinations for presidential vacations in one of the quaint-but-austere cabins built by the Works Progress Administration in the '30s, or head to the nearby town of Thurmont and book a room at the historic Cozy , an inn and restaurant packed with presidential memorabilia.