When Minecraft 1.0 was launched in Nov 2011, we started a new world - Sanctuary. Initially we were without Bukkit and its mods, so we were restricted to a small area so as to not over-explore the world. We made a great little community village then finally were able to use Bukkit and expand the world. Players were initially in Survival mode with no monsters but later were allowed to change modes.
Over time, this world was used less as Frontier was added as a second server until it was finally replaced by the FTB servers.
But now, it is available for you to download from DropBox. There are two zip files - one for the data for the Overworld and one for the Nether and the End. They are set up for Bukkit, so they are in named directories, not Dim directories.
Server Version: Bukkit for 1.3.2
Maps: Sanctuary map
: Sanctuary claims
The links can also be found in Our Worlds - servers, maps, claims, downloads
A simplified png map will be made available in coming days.