Mill Creek Haunted Hollow
I find the best price for styrofoam sheets is at the Home Improvement store. I can go to Lowes and get a 2 ft by 8 ft section of dense 2 in foam for about $15. One sheet will give me 4 or 5 good tombstones. A couple of sheets can backe for fantastic columns, faux stonework, mausoleum walls, etc.