Terror at Orgy Castle (1972) Zoltan G. Spencer

A young couple on a European vacation get mixed up with a countess and a hunchbacked servant at a castle where black masses are held. 

A couple on their honeymoon spend the night at a castle. Little do they know that there are some sinister things going on. Eventually they get caught up in the peversion and mayhem. The married couple are both attractive to look at (especially the bride, who is stunning), and there's enough nudity to satisfy even the most jaded of viewers. Soft-core regular Jane Tsentas makes an appearance and does a lot with a very small role. No dialog, as they hadn't the budget for sound. Instead, there is a voice-over narration. Good, harmless fun.