A critical element that comes into play when creating a haunted attraction is the difference between a seasonal installation versus a permanent build.
Haunts built for seasonal installations are always at a disadvantage, because they are designed for a temporary location that the owners have leased for October, plus a week, or so, on either side for setup/tear-down. The sets are created in pieces as part of a modular design that is then broken down, trucked in and quickly reassembled at the site. Once the season is over, the sets are struck and hauled away to sit in storage until the next year. Modular sets are designed to be moved and, most often, appear sparse, lightweight and cheaply built, with little eye for detail.
On the other hand, a haunt built in a permanent location removes the need for the set to be assembled and struck each year. In a perfect world, it affords the designer the entire off-season, or 10 whole months, to improve their haunt. This is the advantage that the owner of 13th Door - Beaverton, OR has used to build a truly superior dark attraction. It would not surprise me to discover that Ray, along with his build team, spend some part of every day throughout the off season working on their haunt. All of this hard work and devotion to the craft is evident in the final result.
Attention to detail. Lighting. Set design. It even smells like a nightmare should. Every aspect flows together and makes the transition from reality into the willing suspension of disbelief all too easy. Walk through the entrance of 13th Door and you are inside a horror story. All of it seems very real and all of it is well done.