Before even contemplating scenery I'd advise you nail the basics of building great coasters.
Then practice creating buildings and looking at "experts" creations on here, look at how they form their buildings and how they place scenery.
you can (and must) desing your own scenery, two of the most common used programs are the object creator and the anim8or,
http://www.gravimetricstudios.comhttp://www.anim8or.comon both sides are good tutorials
i don't mean to be rude, but once you finished them feel free to ask again for some help, cos we aren't tutorials
Umm this is the RCT division of the forum, not NL. peteweber9 please just ignore hyyyper's post as he thought you were talking about different software.