I have downloaded a couple of parks and put them in the rct3/parks folder, but they don't appear when I go to load them in-game. What am I doing wrong?

If the parks contain any of the expansion material (Soaked/Wild) and if you don't have the expansions, the parks may not work.

noo it will show up beelitz

u have to make sure it was a park and look and any thing that will help u decide which 1 it ssays either scenario or parks

I said may..