The "Believers' Palace--Outside. The palace was supposedly a venue for Saddam to entertain members of the Ba'ath party. It was used for that, but that wasn't it's real purpose.
...and inside. This is what's left of the main reviewing hall after the Air Force dropped two 2,000 lbs. GPS guided bombs through the roof during the war. The damage looks extensive, but you realize it isn't once you know the real purpose for the building...