Meville Hospital. 66 000sqft 4 floors including the damp, moldy, dimly lit basement, 5 stairwells, various cafeatria and hospital objects. And a tunnel too! Had the chance to play there 4 times. Best CQB place ever. Can't forget kicking mouseholes through the walls, pushing dresser drawers down the hallways for cover. Damn shame they tore it down for condo development.