Well I've seen that indeed many people have not understood how to extract maps and so I will give them a hint, so that they won't spam forums.
First of All : DOWNLOAD THIS Filebeam - Free Fast File Hosting
Now: Place this ad.exe file in your World of Warcraft Directory.
Create a folder called "maps" (without the "") in your World of Warcraft Directory.
Double Click on the ad.exe file and let it do the extracting.
NOTE: The extracting process will take from 15 up to 45 minutes, if you have a slow computer {like me}.
The file is not a virus, don't be afraid. It's taken from AC-web ultimate repack.
Cheers,
Karkas