In the fall, I enjoy wandering cemeteries. It is surprisingly relaxing and I can take photos of the tombstones. Creepier cemeteries, like the one in Minneapolis, have fallen into disrepair from lack of funds or a careless caretaker. Or the occasional ghost. Take your pick.
Adding black and white prints of cemetery photography can add a spooky ambiance to your Halloween decor. People will definitely notice that you went the extra mile keeping your spooky themes going. You can even put some tombstones in your front yard to connect the theme both inside and outside your home. Any Target, Michaels, or other retailer will have them during the autumn season.
Lucky for you, I have such items available on my Etsy page.