Clare
Here's one of me and my friends in Mayan Blue, B tunnel.....
http://www.pvv.org/~olafb/dir-no/vid...anBlue-3MB.wmv
Not as nicely decorated as some Mexico caves like Nah Hoch, but it gives you some idea.
Bob
Edit: or you can try this link
http://www.dir-no.org/index.php?id=24