I'm glad some Aggies on here agree with me on the demolition of Guion Hall. It anchored military walk and was torn down in the early 1970s (well before my time...I am Class of '87)
I couldn't find a photo of the arches and tunnels on the old north endzone horseshoe, but it was the tunnels and arches on the north side that were iconic. If there was a post card of Kyle Field from the 1920s-1950s the north entrance is probably what would be featured. The photo below shows the arches all around Kyle Field when it was only one level.
All of us love Kyle Field because of the history there. With the north side arches and tunnels gone I'm not sure there is much left architecturally that is iconic to save. Maybe when they rebuild Kyle Field they can incorporate some of the elements of the already demolished arches, the tackle box layout, the incredible height, etc.
In my opinion there have always been some fundamental issues with Kyle Field. Obviously it was originally built with a track around it which is no longer in use (and is now covered with a black, rubber-like surface). This results in the stands being too far away from the field of play. In addition the stands were built very shallow (see second photo below) which takes the fans further away from the action than they could be if new stands were built steeper. Even the upper decks have very little overlap which results in the second and third level stands (east and west) that are too far away from the field.
New east, west and south side stands need to be built closer to the field and steeper to keep the fans close to the action and Kyle Field will even be louder than it is now!
[This message has been edited by Old Main (edited 10/28/2011 1:18p).]