world (4).zip is a release file of the Minecraft map Elevate, made for Minecraft 1.9. It was published on March 20, 2016 and is 0.4 MB in size. For the full description, screenshots and every other version, visit the Elevate map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.
