That sounds alot like the one I posted a pic of in this thread:
http://www.professionalsoldiers.com/...?t=6647&page=2
Its concrete blocks and an outer layer of some other stones to make it look pretty so my grandmother wouldnt complain about how ugly it is.
Many of you guys do some highspeed cooking anybody have one of these?
http://biggreenegg.com/
The place that has all the woodchips I get for my grill is selling the crap out of these things for some reason.