The original mansion that inspired Disney World's "Haunted Mansion" is officially up for sale for 1.75 mil. This famous mansion named the "Harry Packer Mansion" is located in Jim Thorpe, PA.
Supposedly, according to their website this mansion was used as a model for Walt Disney World's Magic Kingdom in Orlando, FL. Personally, I think it looks very similar to the original haunted mansion at Disney Land in California (I grew up 10 minutes away)...
In recent years, the mansion has been host to weekend murder mystery weekends:
"The Murder Mystery at the Harry Packer Mansion is based on factual events with a creative twist. Have you ever wondered what it would be like to rub elbows with the elite? Now's your chance... The characters in our scenario of murder and mahem are Packers or intimate friends of the family. The plot revolves around the Packer fortune - literally millions amassed on the Lehigh Valley Railroad - and its hopeful heirs. We offer the mystery each weekend for up to 12 couples."