There are a number of geography-based audio interfaces, but one that’s been around for years and the one that’s still my favorite is Radio Aporee (aka the Global Soundmap Project) (the home page is kind of a wreck, so I’m linking right to the map page). Initially, you’re zoomed into the most recent upload, but you can zoom out and browse or search any place in the world, drop in, and take a listen to the audio in that location. There is also a “radio” version that is “a responsive stream of sound, a topographic radio that listens, that may (or may not…) recognise and react to events, e.g. new sound uploads, listeners tuning in, mobile app activity, live sessions, phone calls etc.” It’s a good place to start if you’re not sure what (or where) you want to hear.

As you might expect, this is best enjoyed with headphones.

At this point, there’s almost 154 days' worth of audio spread across over 46,000 locations from over 2,000 contributors. Additionally, all audio is also archived at archive.org. And of course, there’s an atom feed (anyone else feeling wistful for the syndication format wars?).