I was sightseeing around Paris the other day, when I decided to do something a bit risky and fly under the Eiffel tower. Just as I was entering the space between the ground and the first platform, FS stopped and claimed that I crashed. I quickly switched to spot view and it was clear that my plane hadn't actually collided with anything. It appears that the Eiffel tower is solid, rather than having a bunch of empty space perfect for stunt flying. I remember being able to fly "through" the Golden Gate bridge in FS2000 (haven't tried this in FS2002 though), so this surprised me.
Has anyone else encountered something like this? Any mod suggestions?