Maybe it's just me, but I was pleasantly surprised to receive the article by Nancy Kilpatrick on British ossuaries in the latest BFS mailshot.
I love seeking-out the weird and wonderful out-of-the-way places that never seem to make their way onto the tourist maps.
Some favourites I've found this year (East Anglian bias unfortunately):
The Wenhaston Doom:
http://www.suffolkchurches.co.uk/wenhaston.html(Demons and sinners galore - reminded me of the old Dr Who episode 'The Awakening')
Royston Cave:
http://en.wikipedia.org/wiki/Royston_Cave(Knights Templars, witches and the Holy Grail - surprised Dan Brown hasn't been here before!)
St Benet's Abbey:
http://en.wikipedia.org/wiki/St_Benet%27s_Abbey(Notorious as a site for contemporary black magic rituals)
Any more recommendations for the off-beat tourist?