Though there are more than 1,700 rail-trails across America, covering all different shapes and sizes, a small handful stand out as true superstars of the rail-trail movement. Whether for the beauty of their surrounds, their length, or an indefinable charm and character, these rail-trails become beloved attractions drawing praise, and visitors, from near and far. On this list are trails such as the Route of the Hiawatha in Idaho, the Katy Trail State Park in Missouri, and Vermont's Island Line. Right...