Old location in Oakland, CA - Maybe KOA every once in a while. (Daytimes: adjacent to 860 KTRB, the move-in from Modesto to San Francisco that ultimately was a disaster)
Legacy/Historic - I spent my teenage years near St. Louis. I knew enough about radio to know that KFUO was supposed to be a daytime station. But, evening after evening, they stayed on for about an hour after sunset. I finally learned that KFUO actually had a "limited time" license that allowed it to stay on until Denver's local sunset time. So KFUO got an extra hour compared to the other St. Louis area daytimers. On July 1, 1940 KFUO shifted to the 830 frequency - which became 850 after NARBA in 1941 - to resolve what had become a contentious share-time arrangement with 550 KSD. KFUO's ad in (ironically) the St. Louis
Post-Dispatch explained, "The new frequency is approximately 1/3 of the distance from KFUO's present frequency toward the other end of the dial." Kind of an odd way of explaining it, but....
Also during the years I lived near St. Louis, I would see quite a few obituaries where memorials were suggested to the KFUO station fund at the Lutheran Church-Missouri Synod. Yes, there were a lot of Lutherans in east-central Missouri!
Present-day - I moved to Denver two weeks ago, so KOA is what I get on 850 all the time. Once I got some of the computers up and running, I started looking at the history cards for the local stations. A detail in the KOA history card caught my eye. Its original location as built by General Electric was 1370 Krameria Street. Hmmm...I think to myself...that's six or seven blocks from my house. So I decided to dig into the history of the site. Under NBC's auspices, KOA increased power to 50 kw and moved to Aurora sometime around 1933. In 1937, the Colorado state highway department bought the building for $25,000 to serve as a laboratory for "testing highway materials", according to an Associated Press dispatch on March 25. That same story cited the original cost of the building as $95,000. The building was sold in 1954.
Sometime between then and now, this happened:

Yep, that's what used to be 1370 Krameria. The address is now on East 14th Avenue.
I can find that there was a Safeway store there in 1972, but not sure about earlier years between then and 1954. Hard to imagine there was once a major radio facility there.
About present-day KOA - I find it to be a disappointing station. News coverage is skimpy and often of the rip-and-read variety, even in the morning news block. The rest of the day is worse. Talk programming is a bunch of right-wing talking points, out of touch with what Denver has become. Lots of sports talk and sports coverage, which probably covers up the deficiencies in other times of the day. I wonder what it was like before General Electric sold it. It had to have been an impressive operation.