The final city I visited over my September Kymenlaakso weekend was Kotka. With its population of 55,000 Kotka is the second largest city of Kymenlaakso, after Kouvola. A lively seaside town, it is not quite as old as Hamina, but still can boast some history too.
Kotka is located in the estuary of Kymi (Kymijoki) river, the one Kymenlaakso Region gets its name from. Kymi splits into two branches near the modern Valkmusa National Park; the western branch flows into the Gulf of Finland at Pyhtää, a mostly unremarkable small old town, and the eastern branch splits some more, forming several islands in its mouth, and these islands are where modern Kotka is located.