I went to the Madinat hotel the other night, after my few hours inside the Burj al Arab. The Madinat is actually 3 hotels, interlinked by a network of canals. Boats take guests to restaurants, bars and shops in the hotel. It is unique as far as I can tell.
Here is the Burj at night, taken from inside the Madinat hotel.
Here is a view of the massive Madinat complex, taken from the SkyView Bar inside the Burj.
Here is the Jumeirah complex view from the SkyView Bar.