Welcome to one of the biggest Adventure Maps created to date. This was created by over 80 designers with one task: Create an Adventure Encounter that will fit inside a 20x20x20 area. What resulted is this beast of a map. With over 15 hours of gameplay and tonnes of variety, you'll be hard pressed to find a map like this anywhere else. Just watch the trailer and see for yourself. Fully compatible with Minecraft 1.5! (probably, report any bugs here!)
(Copied from Delirious_Doctor pinned thread)
1. Find a map that you want to download. You did that, it's this one you want! Link is above.
2. Download the map to a place that you will remember (Downloads folder, Dekstop, wherever)
3. Unzip or Unrar the file using your archiver of choice (WinRAR, 7Zip, etc).
4. Copy the folder that was unzipped, unrared, etc., and navigate to your Minecraft saves folder:If you're running Windows, your saves are located here:Press the Windows Key and R at the same time. In this dialogue type (or copy and paste) the following%appdata%\.minecraft\savesIf you're running on a Mac, your saves are located here:/Users/*username*/Library/Application Support/minecraft/saves/If you're running Linux, your saves are located here:`/.minecraft/saves
5. Paste the folder and re-name it if you desire.
6. Play Minecraft with the Adventure Multiplex map installed!