No photos allowed so this is a photo of a photo in a book I bought! As in lots of places in China, we could only go on a set tour with a guide. Our guide was excellent - a local girl who was very enthusiastic about the grottoes and her enthusiasm was infectious. However I would really have loved to be able to wander around and get "lost" in the caves. It's lucky we couldn't take photos or I'd have been hopeless.