Another "need to know the name" one is Knoxville, Tennessee. The airport code is TYS. Which is a head-scratcher unless you know the airport's name is McGhee Tys

Another "need to know the name" one is Knoxville, Tennessee. The airport code is TYS. Which is a head-scratcher unless you know the airport's name is McGhee Tyson Airport. Nashville is another one. BNA. The original name of the airport was Berry field. Berry Nashville Airport.