Can I get a gravestone made with a place to hide a cache?????

Maybe it should be a puzzle cache, that you have to figure out how to open the gravestone to reveal the cache inside?

This could be a new product line for the GeoSwag companies....

Seriously, I think discretion is the name of the game. I think virtual caches that lead to intersting and little known significant figures would be very appropriate. Afterall if they didn't want to be visited and remembered, there wouldn't be gravestone markers at all.