Used to fly Rio a few years back in FS2002, just take off and look around, there's SugarLoaf Mountain and some other stuff, can't recall exactly what, but it's a pretty cool place to fly. There's a Rio scenery download here I think that improves things a bit, I seem to recall it had a minor bridge glitch.
I think it's on top of SugarLoaf Mountain, if I'm not confusing it with something else . You can't miss the mountain, it dominates the area, but you might have to get up close to see it.