Can someone identify this game?

I used to play it when I was a small kid, under the age of ten at least. (I'm about 17 now.) All I remember is that it was a PC game about building theme parks. It had somewhat decent graphics if I remember correctly. It would start you out with a blank patch of land, and you had to build a path, then build various rides/hire workers/etc. You could do different themes, like I remember one was Halloween/horror based. Kids would vomit. You could get on the rides, getting a 'point-of-view' screen. That's all I know really.. The only game I've tried finding I thought might be it was 'Roller Coaster Tycoon Deluxe' but the graphics were too pixelated and the game too complicated/old to be right. Maybe it was a newer version, I've seen there's four? I don't know. I'd really like some help identifying this please, I've been trying to find it for years.