I was clicking on the random roller coaster at rcdb and I came across Boomerang at Prater Park. Prater Park is a pretty neat sounding park with a load of old coasters, including a looping woodie, I think. See my [url=http://www.thrillnetwork.com/boards/showthread.php?s=&threadid=19453]previous thread[/url] about that.
Anyway, Boomerang at Prater Park has a tunnel! At least I think it does. Look at the [URL=http://www.rcdb.com/installationgallery1093.htm]pictures[/URL] especially [URL=http://www.rcdb.com/installationgallery1093.htm?Picture=7]this one[/URL]. It sure looks like there's a tunnel on the exit (going forwards) of the cobra roll. Does anyone have any more info on this to confirm it? I think that's a pretty neat idea and a cool way to toy with the old boomerang.