Twin Tunnels (Kittatinny and Blue Mt.) on Pennsylvania Turnpike, West of Carlisle and Harrisburg
Additional Details:
| America's Super Highway"" Kittatinny and Blue Mountain Tunnels are called the ""Twin Tunnels"" as there is only 800 feet of daylight between them; then the mountains are behind you, and the Turnpike runs straight as a ribbon for long distances through the fertile Cumberland Valley |
