I have been tinkering with Rollercoaster Tycoon 3 for some time and completed a project that has taken several months: a recreation of Magic Mountain roughly circa 1980 in as much detail as possible.
Naturally, there are lots of concessions that need to be made when working within the limits of a video game. For example, everything is pretty much on a square grid (e.g. paths and buildings are generally not set up diagonally and Eagle’s Flight to El Dorado station could not go diagonally either.) Also, the sizing of certain rides (e.g. Colossus) helped establish the overall proportions of the layout. Finally, while RCT3 does have an impressive line-up of similar rides, there is no matching Metro train style or Jet Stream boat. Nor is there my beloved Galaxy, which required me to take a little license by trading the space out for post Six Flags’ additions of the Buccanneer and Swashbuckler.
Here are six side-by-side shots of original photos and my RCT3 “reenactments.”
For starters, here’s me riding solo on Circus Wheel and the RCT version:

Get the idea? Ok, how about this reenactment of the very colorful Electric Rainbow post card:

The Persian fountains at night (sadly, no Galaxy):

The Log Jammer and Metro “beauty” shot:

The Metro Whitewater Lake station:

And my favorite, so far, a reenactment of a very early 1970’s view of the East side of the park, as seen from the Japanese Gardens:

All told, however, I am quite satisfied with how this turned out. If you want to see larger versions of these, along with some other full size shots of the park overall (including a kick ass shot of Colossus at night and the famed Showcase Theatre) you’ll find them beginning here in the Magic Mountain photo gallery.
Enjoy!