🇭🇺 Mátraterenye, Hungary

Mátraterenye is a small city located in Hungary with a population of around 4,000 people. While it is not a coastal city, it can still be of interest to seafarers as it is located near the Danube River, which connects to the Black Sea. The city does not have any ports, shipyards, or factories producing ship parts, but it can serve as a base for exploring the region's waterways.