Hi Donna, thanks for that about the boats. I knew there was something about boats at the back of my mind. I have been on the internet and put some facts on as attachments. Blue John and Jet. Hope you find them interesting. love Malcolm. xxx hi malcom, the cave with the boat is called speedwell cavern ,it is a very narrow cave which is only enterd in a narrow boat ,and the men would lie on there backs and move the boat with there legs against the walls . the boats now have engines in .that cave is shut in winter as it floods .the cave with stalanites is called the devils arse ,dont know why it is named that .we go christmas carol singing in there at christmas ,it is very cold .it is a very big cave .the tour guides tell you a story about a caver getting trapped down there and he is still there now buried in concrete as they could not get him out . the other caves are treak cliff and blue john ,which i think they are working in .your right in saying it is the only place it is found .i am not sure ,but i think it is stone . donna ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.1913 / Virus Database: 2411/4948 - Release Date: 04/20/12