Big quarry in the hills, (aren't they all?) on the road from Ballyclare to Broughshane, not too far from Slemish.

Location:

http://maps.google.co.uk/?ll=54.854626,-6.14537&spn=0.008931,0.02738&hnear=Lisburn,+County+Antrim+BT28+2RF,+United+Kingdom&t=h&z=16&vpsrc=6

Streetview (so you know you've gone past it!):

http://maps.google.co.uk/?ll=54.856689,-6.145284&spn=0.000025,0.02738&hnear=Lisburn,+County+Antrim+BT28+2RF,+United+Kingdom&t=h&z=16&vpsrc=6&layer=c&cbll=54.856524,-6.144991&panoid=QKtZtMydgUbFnk2sCSdgqQ&cbp=12,199.18,,0,0