U.S. Route 17, or Kings Highway, a path forged by pioneers that linked Boston to Charleston, S.C., is a pathway that has stood the test of time. For centuries, it has connected people from different regions, and today it’s a bustling thoroughfare replete with hotels, restaurants, and shops. But once upon a time, it was a route of danger, a treacherous and challenging journey that snaked through the inhospitable Grand...