This is the survival world used during 1.10 and 1.11. It was created after the 2016 relaunch and was used up until the 2017 relaunch. The spawn structure for this world was removed to prevent usage of the spawn in other servers, but all player builds are intact.
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.