This is the Creative world from KaizerCraft's Minecraft server, taken as of November 1, 2014.
In late 2014, Chaotic United briefly merged with a server known as KaizerCraft. The server was run by Kaizer, a friend of Alycat who had formerly run other MC servers - such as CybercraftSG. The merge with KaizerCraft was attempted in order to help bring additional players by essentially combining the playerbases of the two servers. The merge didn't last long due to disagreements and communication errors.
The worlds from that time, however, have been preserved and are now available for download. The worlds should be used on either MC 1.7.10 or MC 1.8.
You cannot take this map, or any structures within it, and run it in your own server or someone else's. This is only for those who wants to continue their projects on it instead of having to start over in single player mode. Breaking this rule will result in your download privileges being permanently suspended and could result in your account being banned.