Huh - looked at that location on street view and it is so weird seeing a modern AT&T logo on a Long Lines site building!
Microwave backhaul fascinates me... I think the most interesting example of it that blows my mind is the private backhauls that are going up between major financial hubs in the US like Chicago <-> New York. Since latency is a huge deal for a lot of these HFT traders some intense stuff gets engineered:
https://arstechnica.com/information-technology/2016/11/priva...
Specific quote I'm referencing:
> The researchers then used the FCC and other records to deduce that, at the time of their 2013 study, there were 15 (!) networks licensed to operate microwave links between the two cities.
Freakin' wild!