Big Joe Boss Battle!.zip is a release file of the Minecraft map BIG JOE BOSS BATTLE!!!!!, made for Minecraft 1.8-Snapshot. It was published on July 4, 2014 and is 0.2 MB in size. For the full description, screenshots and every other version, visit the BIG JOE BOSS BATTLE!!!!! map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.