Secret Soci.,anegl,demon Photography ideas?

I am doing a theme series entitled "Angels & Demons" for a artsale/show. I am combing secret societies,cemeteries,churches,tombs,gothic arcitecture,etc

I am looking for ideas for shots. Anything related would be great. I also considered doing symbolic shots as well, so if you have any ideas of some symbology used in occult/secret societies please post.

I am in the north east so anything in or around New England I can shoot. Please help.