Brave man. !! Over to you.OK. I will answer, since it was I that started the ball rolling, by asking Sweden when I shouldn't have.
I couldn't resist it, as I had read about this place last year, it has had several owners since the original billionaire built it, and has now gone into receivership.
The answer is, Dragon Gate, Tierp, Sweden. Originally to be a business park and meeting centre between China and Sweden, The site north of Uppsala was chosen because a map of the local area resembles a Dragon.