Former airforce airdrome Vandel, now a occasional playground for speed ( no its not open every day try once every month at best / average )
And it would seem host for a little solar array.
Dunno why the Swedes came over here to run their monster, they are a motorsport nation we cant even jump up and bite in the knees.
If you are strapped for time jump to 1:50
this is the closest thing i could find... and i have a feeling it's not quite the same as what you're looking for. it probably doesn't have a beacon that is grail-shaped.
There is a way to do something like this without incurring the risk of being charged with a false report but I won't post it publicly nor do I recommend it except in extreme cases. Almost always your best bet is honesty