Okay, I think I need to comment on this. I built all those BURP cliffs and the landscaping, etc. Don't worry! This picture was taken of a work in progress, and it looks much better when finished. I may post a portion and Marcus may post a portion, but it's coming soon. My page is The Mudd Hole.
Wow that looks really good, but try not to just stack the "BURPs (Big ugly rock pile)" all in a row. Make it look like they're not even there by adding different pieces to it at the bottom. Like slopes. Check out this tutorial: http://mocpages.com/moc.php/64972 You'll find it most helpful!