A historical tour of the Bay State's oldest burial grounds--and the sometimes-spooky stories behind them.   Massachusetts's historic graveyards are the final resting places for tales of the strange and supernatural. From Newburyport to Truro, these graveyards often frighten the living, but the dead who rest within them have stories to share with the world they left behind.   While Giles Corey is said to haunt the Howard Street Cemetery in Salem, cursing those involved in the infamous witch trials, visitors to the Forest Hills Cemetery in Jamaica Plain enjoy an arboretum and a burial ground with Victorian-era memorials. One of the oldest cemeteries in Massachusetts, Old Burial Hill in Marblehead, has been the final resting place for residents for nearly 375 years. Author Roxie Zwicker tours the Bay State's oldest burial grounds, exploring the stones, stories and supernatural lore of these hallowed places.   Includes photos