Here is an article explaining why the rape tunnel was a hoax:

http://blogs.miaminewtimes.com/riptide/2009/09/artlurker_explains_rape_tunnel.php

One of the pictures was taken directly from this website:

http://www.geversaircraft.com/wt/wt5x7.htm

Compare-

http://www.artlurker.com/2009/09/the-rape-tunnel-by-sheila-zareno/