Bohemia Grove is a private boys club in the woods near San Francisco. Founded as a getaway for artists, musicians and actors to perform plays and music in private, it ended up being colonised by big league politicians and businessmen who get hopelessly drunk and wee everywhere [perhaps a premonition of the future of Glastonbury Festivals none to distant future]. Anyway, they built a great big owl statue there where they do a little annual ritual which conspiracy theorists see as proof that all our leaders are Satanists and owls are evil or something. Which is probably a more flattering version than the truth that they’re blowing all your money on big piss parties in the woods but still, nice owl.
For furthering reading on the subject and other conspiracies, I recommend Them: Adventures with Extremists by Jon Ronson.