is trying to do just that; locate every single cemetery, not just in the US, but elsewhere. They need volunteers from every county to get this done. Signing up is free. Help is found on the forums. I am trying to locate and photograph each and every cemetery and each and every tombstone in my county. Thankfully, I'm not the only one in this county who is contributing. Even if you do only one cemetery, think that someone may be looking for just that cemetery. GPS co-ordinates along with a map are encouraged.