The family and I went to a great haunted house nearby where I live in Lawrence, Indiana. It's called Screamers and is extreamly detailed and story driven. It's about a family of backwoods murders and the amount of work put into it is amazing. They are able to do this because the building they use is attached to a local put-put and arcade lets them keep their constructs up year around and they can constantly add to what was there from the year before or change things around at any time. They make all their own masks aniamatronics, sculpted dummies, etc. The guys who do it all were nice enough to let go through with the lights on and point out how they did certain parts and the level of detail was even more amazing! It was a blast!
Here is a link if you are interested: