Thanks folks,
I still have a few caves to photograph. The more research I do, the more of these mysterious places I find.
I still need to photograph one of the man made mine entrances that exist in the sea cliffs of the Causeway coast. Also I need to go over to Rathlin Island to seek the legendary Bruce's cave. This is where Robert the Bruce, the Scottish freedom fighter is said to have regained his strength after battle. It's never been photographed although I have a good idea where to find it. Again, access is very difficult and will require the dinghy.
Andy