Insomnia.zip is a release file of the Minecraft map Insomnia -- Minecraft Sprint Map!, made for Minecraft 1.5.2. It was published on May 16, 2013 and is 5.5 MB in size. For the full description, screenshots and every other version, visit the Insomnia -- Minecraft Sprint Map! map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.