The presenter was probably one important factor why this was rated so high. She obviously did an excellent job. The cave certainly is very unusual and had a number of unanswered questions. A very nice place to visit and may attract further research into the subject later. However, it does not deserve a rating higher than the Edinburgh castle. Must book before embarking on the bus trip, even in a low season like early March. There were 2 parties who was refused entry because they did not book before hand.