Re: Embarrassing ...
I live 5 miles from there and never knew. That said, last time went to Croome Court was about 5 years ago.
Witley court was much better before it was "restored", especially on Halloween. It's also not very techie.
You could do Drakelow (about 30 - 45 mins drive) when it's open. It was a top secret hush hush bunker, except everyone in within 10 miles knew exactly how to find it.