Trying to find old wad: Duke Nukem enemies & huge outdoor cliffs?

[princetontiger]

I'm trying to find a wad I remember palying back in 2005 on ZDaemon. It had tons of flying Duke Nukem monsters, and I remember an outdoor area with stone cliffs. The map was HUGE, with a lot of empty sky and space below this cliff. It had light brown textures, with blue sky.

[Pegleg]