Simply enough; the spawn of this world is a "barren wasteland" made of sand, dirt, some water, and strangely sand with snow on it. I used Zexanima's "Zombie Apocalypse" mod to generate the barren parts. The problem is, not the whole world is like that, only the spawn and an adequately-sized area around it. All the credit goes to Zexanima for the mod, I just took the pictures and uploaded my save for your convenience.

Mod: http://www.planetminecraft.com/mod/zombie-apocalypse-v-01/

Zexanima's page: http://www.planetminecraft.com/member/zexanima/

Additional Notes

Full credit to Zexanima and TightMrK133r

Mod: http://www.planetminecraft.com/mod/zombie-apocalypse-v-01/

Zexanima's page: http://www.planetminecraft.com/member/zexanima/