When you go for the interview, you'll notice the abscence of a 1/2 wave vertical radiator (about 600' or 192 degrees electrical length to be specific) anywhere near the studios. The studios of WBAP (and KSCS) moved east from where they were on Broadcast Hill (3900 Barnett or so) to Arlington; at this new location it almost straddles the county line.
The transmitter facility is SE of Fort Worth in SE Tarrant county.
See?
* Some of the lowered-power mom and pop operations may be co-located, but with the plethora of STL options open today this doesn't have to be the case as it once was ...