The only time that I've actively listened to AM purposefully (other than curiously "just to see what's there") is AM 1610. [0]. 1610 is often used in the US for Visitor Information -- short 3-10 minute recordings on automated loop [1]. I find them useful when visiting a new park for the first time, and before I stop in the visitor center.

[0] https://en.wikipedia.org/wiki/1610_AM

[1] https://en.wikipedia.org/wiki/Travelers%27_information_stati...

[2] Yellowstone National Park 1610 recording. https://www.nps.gov/media/video/view.htm?id=E4A26B7F-1DD8-B7...