I have also just released the Celestial Buildings by Dr Rick. They were started in 2008 and were shelved due to Rick's ill health and the info threads here vanishing as well.
From Jay: Yes, it is Disney's Haunted Mansion. The building itself represents the Haunted Mansion at Disneyland in California. A number of years ago, a number of designers in the RCT2 user community created a lot of Disneyland objects. That included objects for a Disney Haunted Mansion ride. They also used lots of tiny pieces to create the exterior of the building itself, as seen in the earlier image. So I do not take credit for that. I did not create it myself because they did a fantastic job at reproducing the actual Disneyland Haunted Mansion building. Here is a picture in Wikipedia of the actual building:
https://commons.wikimedia.org/wiki/File:Haunted_Mansion_July_4.jpg
I did the layout of things around the building from lots of things made for RCT2. When guests use this building in ZT, most of the top of the building will disappear so that the inside of it can be seen. It contains an animated haunted mansion ride, with the entire layout done by me from lots of things made for RCT2. Some of those things are based on Disney's Haunted Mansion rides; some are based on other Disney rides, some are based on Harry Potter and Lord Of The Rings; the rest are other things that fit into a haunted mansion theme. The default price for guests to use the building is 13, since the "ghostfather clock" at Disney's Haunted Mansions strikes 13. Like Disney's Haunted Mansions, this is meant to be a playful haunt rather than a scary haunt. Disneyland has train tracks going around the park. When they designed the Haunted Mansion for the park, they didn't have room inside the train tracks for the ride. So what people see as the Haunted Mansion is a facade. It has a couple elevators disguised as stretching rooms to get people below ground. People then walk down a corridor that appears to have windows, but they are actually underground. That corridor gets the people to the other side of the railroad tracks where the building containing the actual ride exists. But in this version for ZT, the ride is inside the Haunted Mansion building. Disneyland's Haunted Mansion was created when I was a boy. It was made before portable computers and cell phones existed. Computers back then had to be in their own air conditioned computer rooms. Those computers were expensive. So companies used computers for payroll, financial, and scheduling purposes. But Disney used a minicomputer in one of those air conditioned computer rooms to control everything in the Haunted Mansion. That showed me that computers can be used to bring enjoyment to others. So it inspired me to become a computer software engineer, making programs that control machines. As it turned out, I did this work for manufacturing companies rather than for entertainment companies. But that desire to use computers to try to bring enjoyment to others is what eventually led me to helping in the ZT user community.