I was playing with some mods (mc heil, Superheroes Unlimited mod) and next to my base I made there was HUGE speare of gamma radiation growing so I had to quickly remove the Superheroes Unlimited mod & here is the hole P.S even the bedrock was gone, I tryed to plase some water but that did not help
its his own singleplayer world nub and @legostar5wars there is no way to reverse it unless you recreate the world. that will reset it to its original seed
Oh its a single player world? Well in that case, you can't recover it unless you had a backup save. See this for making Backup worlds http://www.minecraftforum.net/forums/minecraft-discussion/discussion/114461-minecraft-world-backup Copy and Paste if hyperlinks aren't supported on this forum.