Felipe
If you mean the large building illuminated in blue, then it is the County Hall Riverside Building home of the The London Dungeons (to the left) & The London Aqaurium (to the right), These are both Merlin Midway attractions along with the Eye itself.
If you mean the large building illuminated in blue, then it is the County Hall Riverside Building home of the The London Dungeons (to the left) & The London Aqaurium (to the right), These are both Merlin Midway attractions along with the Eye itself.