A couple of years ago, shortly after my mum's friend M died, the gravediggers were at work in our village churchyard. Unexpectedly, they hit concrete a few inches underground. Moving over a burial plot, yet more concrete. Three more plots across before they found earth again.
They were mystified. This was the first burial in the churchyard for a couple of decades and the first in a new plot for much longer, it's not a village with a high death rate. The vicar had no idea, she's only been in the job for a few years. It seems the records were a little badly kept.
My dad knew what it was straight away when they asked him, they'd found the Vault. A bit of a local legend, that one.
I can remember people talking about it when I was very young, it was the kind of local gossip that hung around. Some time in the decade before I was born an elderly female relative of a local man died. She was quite wealthy, so the story went, and the man - let's say he had a reputation for being a little sharp - made it his business to work his way into her affections while she was in her dotage. With some success, as he secured the inheritance of her money.
The old lady had nominated a close friend as her executor. She saw through the man pretty quickly, though she couldn't prevent her friend changing her will in his favour. So when the old lady died she could only watch as the heir awaited probate so he could collect his cheque.
The executor had a job to do though, she had to arrange the old lady's funeral and burial. For which the estate of the deceased would of course pay. She proceeded to perform that task for her friend by arranging the most lavish funeral and burial that money could buy in the 1960s, which is why hidden under the turf of a quiet country churchyard there lies - so I'm told, I've never seen it - a full-sized millionaire-spec walk-in vault containing a single extremely expensive coffin. The story repeated when I was young with many a smirk at the expense of the heir was that there wasn't even any money left over for grass seed when the vault was covered over, still less for an inheritance.
I've often wondered what an archaeologist will make of it in a few hundred years time.