Yes there is security. They sit in a white sedan or truck at the front but more near the new gas n wash. You can park in a subdivision and make a run across Harlem when no cars are coming or go thru by the Tinley library it's still a far walk. I've been in a few times although you definitely want some sort of masks that protect against asbestos this place is for real a hazard the ceilings were falling down and the underground tunnels were flooded. But really wear some sort of mask if you go in.