In the German Ubuntu Wiki there’s a list of many streaming URLs of (local) radio stations ordered by country: wiki.ubuntuusers.de/Internetradio/Stationen/

Then they also have this list of online only radio stations, but those are heavily skewed towards German stations: wiki.ubuntuusers.de/…/Internetradio-Stationen/

Just plug those URLs into VLC or any other app of your choice (heck, even the browser should work) and you’re good to go.