NOTE Point of information (I had to look it up) "barn find" refers to old cars in storage as in "covered with a tarp in an old barn for decades".
On this whole topic, I and most of my fambly think that cemeteries with grave stones and the like is a custom which should be discontinued. If there is anything which continues after death such as a soul it doesn't seem that it could be connected to the remains of the material body in any substantive way. So that real estate should rightly be devoted to the living.
I understand honoring the dead and fully endorse cherishing and preserving their memory. But it seems to me that there is a better way to do that than taking up land that might be utilized for more practical purposes.
Besides there are things like what happened in
the Shining,
Poltergeist and other horror movies to consider. Neh?