Don't have photo, but I've always wanted to do the large open mouth with the face above. I have seen several variations - clowns, monsters, witch, etc... and it would be fun to do.
Main entrance is just a large enough opening for everyone to walk through but have the eyes up there, maybe a nose that is 3D (clown nose would be a large round object, build a simple projection for a witch's nose to crook over people as the walked in). The haunted house that I grew up with had a facade like that with the nose extending out over 10 feet above the wait line and they hooked a sprinkler up in one of the nostrils and periodically sprayed the folks in line - lots of screams even before getting inside!
Could even do a carpet tongue that leads inside.
I'm doing a huge face on my garage facade next year. The opening is going to have teeth along the top and bottom and I'm getting some really cool lightup eyes...