And to add a location from a single player game, I think my vote goes to that neat little waterfall and pond about half way between the temple area where the water mages are exploring the ruins of this ancient culture and the pirates/desert area in Gothic 2: NotR. You know, that place that had "Costa Rica" written all over it .
Ah yes, if memory serves me correctly you could jump off the top and take a very long plunge to the water below. In fact, some type of message pops up on the screen for doing it, right?