On one of my worlds in my Bukkit server, I found some really awesome mountains, cliffs, and areas. Sorry if the images might be big. Everything is in the same area!
Another mountain (has a waterfall):
An interesting cliff:
Back views:
Another back veiw with another cool mountain next to it:
you have a corrupted seed judging by the way your map suddenly cuts into desert. I had something similar, simply delete the mismatched chunks on my edit they go back into a map back up (u'll need one) and copy and paste the leve.dat file, as it has the original non corrupted seed.
Another mountain (has a waterfall):
An interesting cliff:
Back views:
Another back veiw with another cool mountain next to it:
The mountain next to it (side view):
Looking down into it:
Looking up from it:
Something else I found:
Sorry, but no seed.