2448812257310190042Minecraft 1.5 - 1.5.2 Seed
Spawns you underwater nearby a small,
Seed Code: 2448812257310190042
Spawn points
X: 437 / Y: 45 / Z: -329
Locations

X: 442 / Y: 70 / Z: -346
Same as spawn. If you create a boat and go in almost every direction, you'll find that land almost perfectly borders in almost every direction. (south/west may be excluded)
What texture pack or resource pack do you use?