In reply to patrick_b: I've been a few times but not for a year or so. It makes a change from the wall, it's free and you can have a good time for a few hours if it's sunny. I wouldn't travel miles to get there but if it's half an hour or so it's worth a visit. Never noticed any problems with broken glass or similar. I've also set up top ropes for my kids on some of them. There are holes at the top of some of the boulders that you can put a sling (120cm) through.