How would I make a script that places a part at a random location?

Hello scripters, I need some help making a script that places a part at a random location on terrain. The terrain I'm using has hills and mountains in it, so I don't know how to randomly place a part without that part going through the terrain. If you could help guide me in the right direction, or even give me some code that might do it, that would be greatly appreciated. Thank you!