I went to Brick City a couple of years ago after they changed from Adventure Dome. About a month ago, I had another opportunity to go. Not much has changed since visiting 2 years ago. If you ever went to the Adventure Dome, you know that the dome is a big room where you used to watch an IMAX-like movie). The projection equipment and screen are gone, and now the room is a brightly painted play room. Almost the entire room is taken up a giant Lego display created by Marek Cyran. There are well-known landmarks, trains, pop-culture references, and more. Since I was there last, the main pieces are still there, but there have been some additions. There is also a play area now where kids can make their own Lego creations.
As is always the case, you can see some of the thumbnails below, and view all of the thumbnails and larger pictures in the Brick City in Summer 2007 gallery.
I also took a video of Brick City while I was inside.