the northern portion of Curonian Spit National Park lies within a country in the Baltic region of northern-eastern Europe that is bordered to the north by what?
Curonian Spit National Park (Russia) Curonian Spit National Park (Russian: Куршская коса ) (Also: Kurshskaya Kosa) covers the Russian-owned southern 41 km of the 98 km long, curved Curonian Spit – a type of depositional sandbar. The spit separates the salt-water Baltic Sea (on the west) from the freshwater Curonian Lagoon to the east. The southern portion of the spit lies within Zelenogradsky District in Kaliningrad Oblast, Russia; the northern portion lies within southwestern Lithuania. It is a UNESCO World Heritage Site shared by the two countries.
Slovenia Slovenia ( ; Slovene: "Slovenija" ] ), officially the Republic of Slovenia (Slovene:    , abbr.: "RS"), is a nation state located in the southern Central Europe, variously classified as part of Eastern and Southern Europe. The country is located at the crossroads of main European cultural and trade routes. It is bordered by Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the south and southeast, and the Adriatic Sea to the southwest. It covers 20,273 km2 and has a population of 2.06 million. It is a parliamentary republic and a member of the United Nations, European Union, and NATO. The capital and largest city is Ljubljana.