Test 21.zip is a release file of the Minecraft map Prison Cell 52, made for Minecraft 1.7.10. It was published on September 10, 2016 and is 2.9 MB in size. For the full description, screenshots and every other version, visit the Prison Cell 52 map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.
