This place had been properly forgotten by the time I arrived, to the extent that just finding the keys was tricky; boxes of them were poured onto tables across many offices. When I got to the door I saw how pointless it was locking the place, as the door was almost falling apart. Some genius had put an internal door on the outside and left it unpainted against the unstoppable dampness of 20 winters in the British Isles. When I pulled the handle, it came out, and it took three years for the hospital authorities to put in a new one, which immediately fell out again since they didn't replace the door, but just screwed a new handle into the rotten frame. So I guess the whole world is lucky there were no supervillains wandering about with plans for some sort of brain-powered Cerebrocannon.
When I walked in, the smell hit me like a drunken dockworker whose sexuality and/or favorite sports team had been questioned. A sharp, decaying meaty smell with a fatty edge, coupled with an airborne level of formaldehyde so high it might as well have been teargas. I let it air out for a bit before entering to find that pigeons had made their homes in the upper reaches, brains had cracked out of their cases, and there were so many spiders you'd have thought it was Shelob's Lair.
New Line Cinema
"Oh, you're taller than the last guys."
Everyone knew it was there, unofficially, but even disposing of this level of mess was a major biohazard. I worked as a volunteer for years, but if I'd tried to work on the project officially there would've been miles of red tape to make sure it was "safe" and "efficient" and "not going to melt me from the inside out." Likely as not, they'd have just burned the lot of it to avoid the hassle. The moral of this story: never, ever ask anything.