In the Fringe episode "The Man From The Other Side", when the shape shifters arrived in our universe, the event interrupted the TV signals of several dozen homes within a half-mile radius of the warehouse. The odd interference contained broadcast signals from the alternate universe.
Two of the images displayed appear to be from a episode of LOST, you can clearly see Claire Littleton and Greg Grunburg, the pilot of Oceanic 815. They appear to be in Australia, based on the Kangaroo mural on the wall. According to SimonSmith2007 in the comments:
The LOST scene with Greg Grunberg and Claire Littleton is from the season 1 finale: "Exodus part 3" however it was never broadcast, it was a deleted scene on the Season 1 DVD. So in the alternate universe that scene aired :D
The other two images show some of the differences between our universe and the Walternate universe.
An image of the alternate White House shows a new glass roof. If you recall from the season 1 finale, over there the White House was destroyed on 9/11 - not the World Trade Center.
The last image is of the American flag, but you'll notice right away that the stars are in a different configuration. There appear to only be 48 states represented. This could mean that they never added Alaska and Hawaii, or that two states have seceded... Alaska and Texas?