One of my favorites was in France (under Paris I believe) where they had stacked all the bones they had taken from old graves. There is a government department that is responsible for keeping them all neatly stacked. It was creepy and cool.
The Catacombs... They emptied all the cemeteries from Paris some 200 years ago and dumped all the bones in there. It's actually one of the few place under Paris that you can visit. ( I can give the exact address, entrance fee and all eventually to those interested )
The catacombs is just a tiny ( and suposedly secured as it's some sort of museum ) part of the network of old quarry that riddle that part of Paris.
Now, there's a whole Police department in Paris called Inspection G?n?rale des Carri?res ( Quarry General Inspection ) whose duty is :
- make sure nobody enter the underground network of quarry.
- check the state of the quarry and act in case of what we call a fontis ( the top of the quarry comming down, with the building atop and all ) appears or if the quarry ceilling seems to become weak.
- make some security checks around several places that
shall not be named.
( well it's as if you had a quarry under the Federal reserve or the White House... )
- Check the 100+ ways in/out to make sure they are all sealed...
- Arrest the occasional guy that manage to get in. ( not that occasionnal, as It's dead easy for somebody that live in Paris to know what to look for and where to look for it to find entrances... the hardest is to find an unsealed entrance )
