Kuki's mention of Harrison's Cave on Barbados is a must see. You will take an electric tram through the cave-something like a string of golf carts hitched together. The driver will stop occassionally for you to take photos. I have three photos to attach for your viewing. I can attach only one photo to a posting so I will follow it with two more additions to this thread for you to view photos of the interior of the cave.
Frank those photo's were great. The 1st one broght back memories and reminded me of our tour with the paper napkins under the hard hats! I have a great photo of the 4 of us from the before digital days. It was a very interesting excursion with modern technology used to tour the caves. We have toured many caves in the US & abroad, but find these to be the best we have seen.