Another similar excursion into those tunnels was done by Sleepy City (another exploration group).I wrote about it here if you want to see some photos.http://www.doobybrain.com/2007/08/30/the-tunnels-behind-niagara-falls/ Abusive comment hidden. (Show it anyway.)
I wrote about it here if you want to see some photos.
http://www.doobybrain.com/2007/08/30/the-tunnels-behind-niagara-falls/