For people in the Bay Area, there's one of those towers/installations in Redwood City, it's a large concrete tower there. It's now a data center building. It still has the microwave horns in it. [1]
The Redwood City site is interesting in its own way, as I believe the building below contained the Redwood City tandem at the time prior to its elimination in favor of a single, very large 4ESS tandem at Oakland. It was not very typical for tandem switches to be colocated with large microwave sites, usually being end offices on the microwave network with only two antennas (tandem offices are typically in large cities so AT&T often used a "city and junction" pattern where the tandem office, named for the city, was an end office on a short leg from a large microwave site on the outskirts of town named city junction). The exceptions tended to be in highly urbanized areas where space was difficult to obtain, or a few odd cases like Mojave where an end office grew over time into a gateway site.
In the satellite photo you can see enormous numbers of portable generators waiting for The Big One.
It was presumably out in the middle of nowhere to survive a nuclear attack on San Francisco and Sacramento.