The visitors locker room has never changed... It's probably the worst locker Room in FBS, but the corner towers are original to the stadium and are awesomely unique. The South Wall looks like a fortress in it's stone structure. Most describe it as a seemless transition from old to new. The press towers installed in 1990 were the 2nd largest at the time.
It's also where we've played games for 80 years, and to have a stadium which hasn't moved for that long makes it literally historic.