The Kansas City Municipal Auditorium hosted nine Final Fours (1940-41-42-53-54-55-57-61-64). Old Madison Square Garden hosted seven, Freedom Hall has hosted six, and The Superdome has hosted four.
North Carolina has.
Tyler Hansbrough and Christian Laettner.
London Enland has hosted the most World's Fairs
Miami has hosted the most (10 Super Bowls). New Orleans has hosted nine.