Which sovereign state located in Southeastern Europe has The Mesteacănu River in it.
Mesteacănu River (Lotru) The Mesteacănu River is a tributary of the Lotru River in Romania.
Port of Constanța The Port of Constanța is located in Constanța, Romania, on the western coast of the Black Sea, 179 nmi from the Bosphorus Strait and 85 nmi from the Sulina Branch, through which the Danube river flows into the sea. It covers 3926 ha , of which 1313 ha is land and the rest, 2613 ha , is water. The two breakwaters located northwards and southwards shelter the port, creating the safest conditions for port activities. The present length of the north breakwater is 8.344 km and the south breakwater is 5.560 km .  The Port of Constanța is the second largest on the Black Sea and the 18th largest in Europe.