The airport (“aerodrom”) in Podgorica, Montenegro:
Ok, this is not the airport, but it is the train station for the airport. Unfortunately, I only found out about it later. When I arrived, I asked the lady at the airport information desk if there are any buses or trains into town. She said – incorrectly – that there are none. The taxi cost 15 € (Montenegro doesn’t have its own currency), for which I could have taken the train through the whole country several times.
On the website of the Montenegrin Railway (English version available), you can find the schedule. The stop is about 1 km west of the airport exit, on the other side of the highway. The train to Podgorica costs 1.20 €.