Happy Halloween! According to the author of “The Legend of Sleepy Hollow,” Washington Irving, the Headless Horseman tethers his horse among the Sleepy Hollow Cemetery graves as he wanders throughout the property every night. If you dare, you too can travel to Sleepy Hollow, New York, and walk among the burials, seeing famous internments in the cemetery, such as those of Civil War general Carl Schurz and steel magnate Andrew Carnegie, as well as markers honoring veterans who fought in the America