Unfortunately, the timing of my transit on a business trip did not allow me to take the tour of Graycliff, but the docent in the gift shop was kind and allowed me to step out and take a quick photograph of the buildings. The restoration is in progress as you'll see. Visit the official web site for Graycliff and definitely take the tour if you're in the area. (About 40 minutes from Buffalo.) You may want to check out the Darwin Martin Complex while you're in Buffalo.
The visitor's center and gift shop used to be the gymnasium.