Found by meFound by Minecraft ForumsFound by me, newFound by MC Forums, new404 - Break the gravel in the middle, and look what you found.
Flandre Scarlet-chan - Islands.
Darvince - Spawn in an oasis near a mountain with a waterfall.
Glacier - Awesome landforms.
Furandoru - Spawn in a snow biome with a huge mountain which has a waterfall.
Hiiro - Two sand(stone) overhangs and a small patch of floating sand.
9000.1 - Overhangs and three (more?) waterfalls.
yogscast - Awesome mountains complete with a waterfall.
10110101 - An overhang and a bay.
DRR! DRR! DRR! - Two epic overhangs and epic mountains.
Chopper - Floating islands.
mojang - Long cliff with a patch of pumpkins.
Earth - Epic overhang with a tall darkness.. thingy, and a patch of pumpkins.
Moon - Mini valleys.
Hitler - Ironically, cool mountains with a big tree on the top.
Italia - Surrounded by highlands, spawn near lakes, good place to start imo.
Soviet Russia - Upside down V shape mountain.
Deoxy - Mountains EVERYWHERE.
NeutronStar - Awesome mountains.
p i z z a - A lava fall.
Dead Space - Awesome cliffs, waterfalls, and a floating island.
helmsdeep - Lots of overhangs and cliffs.
Google - A long mountain.
Land of the Lost - Long, tall mountain.
gargamel - Spawn in a dark cave with grass/sand and beautiful mountains.
World of Hitler - Awesome lavafall and a waterfall; a vast mountain range.Destruction of Gensokyo - Overhangs, mountains.