It's sunk into a pit at the back of St Saviour's Church in Aston-by-Stone village, and even climbing down into the pit, to try to gain access to its door, is pretty difficult now (as you can see!).
Even though it's a listed building, now a 150 years old, it is showing signs of collapse too.
The whole churchyard at St Saviour's is littered with the graves of members of the Parker-Jervis line, which owned the adjacent Aston Hall too.
Link: Parker-Jervis Family Vault
This post has been featured on Taphophile Tragics (the cemetery-enthusiasts' website)