Space Mountain II has just re-opened at Disneyland. It’s exactly the same track layout as the original Space Mountain in exactly the same building, but with a 100% new track (which makes for a fast, smooth ride) and some great new special effects (the launch tube and deceleration tube are amazing). They’ve even cut a few new soundtracks for the attraction, which a special night program still in reserve.
But if you’re jonesing for the original experience then someone has been good enough to go through the trouble and make a RollerCoaster Tycoon simulation of the attraction. It’s pretty close to the real thing too.