Seed: TheWallow
Cords: just south of the Hub-City
The cliff (forrest biome) goes along the complete south side of the Hub (has 4 biomes in it) and is, [i guess, 20 blocks high...] measured it it goes from -17 to +83: that's a 100m high!
Don't know much more of the seed, but i haven't found a desert yet .