This map is for 1.12.2, and might not work for other versions.
This map is one that I came up with the Idea after playing a few survival maps and thought that they were kind of boring, and so I decided to create my own map, but with the help of a few structures(1, or 2) from other maps, and I included what I always love including, The Wither Arena, and I decided to include a few more things into this map, such as more island space, more mobs spawning, a cave-ish system(I tried okay, its kind of hard to make a cave system when you don't what you're doing with your commands...), and a few other things that you'll be notified of in the map, such as Nether Portals, End Portal, and other things like that.
This island has all sorts of structures throughout, all over, and around it, along with customized villages, and a few other things.
THIS MAP IS STILL NOT COMPLETED,
But should be playable for the most part, and will constantly be updated, can't say how often tho..... But it'll still be updated from time to time, and if you have any suggestions on what I could add, just leave a comment about it.