I used to love to ride roller coasters but I can't anymore so I create my own and recreate real ones using Roller Coaster Tycoon 3. Here are a few. I love the music of Tangerine Dream and used their music and background for some of my videos:
These are really cool, but I'm going to move the thread to the Workshop, since that's the place where we display and discuss creative efforts. Well, I don't display them, since I have none, but you get the idea.