The skyblock world i have been making, mining the cobble took longest (although i just used blue-tack to stick down left click, and went to watch topgear XD)

The thread for the original map can be found... http://www.minecraftforum.net/topic/600254-surv-skyblock/ ...there

the only mod i used was single player commands, and that was only to take the pictures.

im also thinking of making my own version of skyblock it wont be just a block but more of a realistic floating island.

EDIT: i added some lighting to stop freezing in 1.9 and changed the download to a zip file rather than a rar