Bari and Italian War sites

Has anyone been to Bari and is there anything remarkable about it? My dad was stationed there during the last days of WWII so I thought I might make a stop on my next visit. Any other WWII historical sites would be of interest also although I know Italy's aren't as famous as those in some other European countries. I'd just like to honor his memory by making a mini-pilgrimage. He was in the Army Air Corps and was shot down over what was then Yugoslavia. He was at one point picked up by Italian partisans, saw Musolini hanging from a tree after he was executed, was picked up by British Forces and signed as the American military witness in the surrender of German troops before being given a ride back to US Forces by the British. And he was 19 at the time. We didn't know any of this until he was in his late 70s since he never thought it was right to in any way glamorize war or his participation in it. So I'd like to take some time to stop and honor him and all those other young men who risked, or lost, their lives in Italy. By the way, he once told me that Florence was the most beautiful city he ever saw and I have to say I agree with him.