Here is an example - Mount Moran next to Jackson Lake - Grand Teton in Wyoming ...
The quick calculated scene above and a real photo from the internet (through Google Earth photo links) in comparison between virtual and real landscape:

img253.imageshack.us/img253/9484/mountmoranjacksonlakevutp1.jpg

I might have to adjust the height just a little better - but it does work very good in my opinion.