This week's edition of #TuesDecay (follow along on Google+ to see all the posts) features the Blue Ghost Tunnel (Grand Trunk Railway Tunnel) - a long, winding, abandoned train tunnel that runs under Lock 18 of the 3rd Welland Canal. Dark, damp, and sporting icicle stalactites throughout the winter, it's also said to be haunted . . . which is what first took my camera and I there.