Which version? Because there are a lot: For Pocket Edition, nyan ( just need to see it ) For CPU, -671258039 ( theres a village with 13 diamonds ) For X-Box, lol ( you start on a village and when you build the portal to the nether theres a nether fortress )
The Dossier seed will produce a floating stronghold portal room off the coast of an island at (x=-530, z==820). 126710847933127016 generates a massive overhang in the extreme hills biome at (x=-300, z=220). Check out more seeds on www.minecraftseeds.info/.