>Possible Tunnels under DC
one of those pics is NYC
so not sure what anon is getting at
Atlantic Ave
The Atlantic Avenue tunnel (Also known as the Cobble Hill Tunnel) is a former Long Island railroad tunnel under its namesake avenue in Brooklyn. Built in 1844, it is the oldest tunnel under a city street in North America. It was closed in 1861 and lay dormant until Brooklyn trolley enthusiast Bob Diamond rediscovered it in 1981. Mr. Diamond was able to give weekly tours of this tunnel for many years until the city deemed it too risky. Diamond believes that there may be an old locomotive behind a wall that blocks off part of the tunnel, though any plans to find out had been shelved, pending a lawsuit that has since been settled. The mystery continues, though Diamond is nearly 100% sure the train is buried there