A while back a sweet ass game called Shadow of the Colosus came out. In the game there were 16 (I think) bosses you could fight, each one a gigantic cross between creature, landscape and ancient ruins. I stumbled across this http://boards.ign.com/board/b8115/108935396/p1/?10 and found out that there were actually several more colossi that were taken out of the game. I posted some of the best ones, you can see the rest on the link:
A third "small" colossus to go along with the two "lions".
War of the worlds spider?
Alternate versions of a collosus that made it into the game.
A gargoil/gremlin thing. Looks like he would be fast...
A bird boss left out of the game. A vulture or a peacock?
The colossus from the very first trailer/demo.
And the best for the last, A FRIGGIN DRAGON!!!!!