-- and just like a landfill, a full mausoleum is rendered useless to the cemetery owner. The building can't possibly stand forever ... then what?
I've done contracted work at a new motel in Houston, Texas that was built on top of a civil war era graveyard. There was hardly a tombstone to be found dated anywhere in the 1900s, so they just flattened the monuments and built over the bodies beneath.
Shades of the movie "Poltergeist."