I'm sorry I haven't posted in quite awhile, but I've been listening to the show faithfully and recommending it whenever I can.
Recently I've seen several mentions of the Atlantic Ave tunnel on such varied sources as the History Channel, and the Brooklyn Daily Eagle. This appears to be one of the oldest lengths of subway tunnel in the world and MAY be haunted. Certainly enough deaths have occurred around it to perhaps generate enough spiritual "gumption" to freak out the meekest of mundanes.
The following is an article from a recent Brooklyn Eagle about the tunnel.
http://www.brooklyneagle.com/categories ... 4&id=31633
the following is a link to pictures and other information about tunnel tours.
http://www.brooklynrail.net/proj_aatunnel.html
and this last is some very nice pictures from tunnel tours.
http://curiousexpeditions.org/?p=474