Sideling Hill Tunnel
Sideling Hill Tunnel is one of three original Pennsylvania Turnpike tunnels abandoned (this one in 1968) after two massive realignment projects. It was less expensive to realign the Turnpike than to bore a second tube for four lane traffic. Sideling Hill Tunnel is 6,782 feet long. It was the longest of the original tunnels on the Pennsylvania Turnpike. -from Wikipedia
abandonedbridge
