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Albania, officially the Republic of Albania, is a country in Southeastern Europe. It is situated in the Balkans, and is located on the Adriatic and Ionian Seas within the Mediterranean Sea and shares land borders with Montenegro to the northwest, Kosovo to the northeast, North Macedonia to the east, and Greece to the south. The country displays varied climatic, geological, hydrological, and morphological conditions, in an area of 28,748 km2 (11,100 sq mi). The landscape ranges from the snow-capped mountains in the Albanian Alps and the Korab, Skanderbeg, Pindus, and Ceraunian Mountains, to the hot and sunny coasts of the Adriatic and Ionian Seas along the Mediterranean. Tirana is its capital and largest city, followed by Durrës, Vlorë, and Shkodër.

Andorra, officially the Principality of Andorra, is a sovereign landlocked microstate on the Iberian Peninsula, in the eastern Pyrenees, bordered by France to the north and Spain to the south. Believed to have been created by Charlemagne, Andorra was ruled by the count of Urgell until 988, when it was transferred to the Roman Catholic Diocese of Urgell. The present principality was formed by a charter in 1278. It is headed by two co-princes: the bishop of Urgell in Catalonia, Spain and the president of France. Its capital and largest city is Andorra la Vella.

Austria, formally the Republic of Austria, is a landlocked country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous city and state. Austria is bordered by Germany to the northwest, the Czech Republic to the north, Slovakia to the northeast, Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the west. The country occupies an area of 83,871 km2 (32,383 sq mi) and has a population of 9 million.

Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. The country is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeast, France to the southwest, and the North Sea to the northwest. It covers an area of 30,528 km2 (11,787 sq mi) and has a population of more than 11.5 million, making it the 22nd most densely populated country in the world and the 6th most densely populated country in Europe, with a density of 376/km2 (970/sq mi). Belgium is part of an area known as the Low Countries, historically a somewhat larger region than the Benelux group of states, as it also included parts of northern France. The capital and largest city is Brussels; other major cities are Antwerp, Ghent, Charleroi, Liège, Bruges, Namur, and Leuven.

Bosnia and Herzegovina, abbreviated BiH (БиХ) or B&H, sometimes called Bosnia–Herzegovina and often known informally as Bosnia, is a country in Southeastern Europe, located in the Balkans. Bosnia and Herzegovina borders Serbia to the east, Montenegro to the southeast, and Croatia to the north and southwest. In the south it has a narrow coast on the Adriatic Sea within the Mediterranean, which is about 20 kilometres long and surrounds the town of Neum. Bosnia, which is the inland region of the country, has a moderate continental climate with hot summers and cold, snowy winters. In the central and eastern regions of the country, the geography is mountainous, in the northwest it is moderately hilly, and in the northeast it is predominantly flat. Herzegovina, which is the smaller, southern region of the country, has a Mediterranean climate and is mostly mountainous. Sarajevo is the capital and the largest city of the country followed by Banja Luka, Tuzla and Zenica.

Croatia, officially the Republic of Croatia, is a country at the crossroads of Central and Southeast Europe. Its coast lies entirely on the Adriatic Sea. It borders Slovenia to the northwest, Hungary to the northeast, Serbia to the east, Bosnia and Herzegovina and Montenegro to the southeast, and shares a maritime border with Italy to the west and southwest. Its capital and largest city, Zagreb, forms one of the country's primary subdivisions, with twenty counties. The country spans 56,594 square kilometres, and has a population of nearly 3.9 million.

The Czech Republic, also known as Czechia, is a landlocked country in Central Europe. Historically known as Bohemia, it is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the southeast. The Czech Republic has a hilly landscape that covers an area of 78,871 square kilometers (30,452 sq mi) with a mostly temperate continental and oceanic climate. The capital and largest city is Prague; other major cities and urban areas include Brno, Ostrava, Plzeň and Liberec.

Denmark is a Nordic constituent country in Northern Europe. It is the most populous and politically central constituent of the Kingdom of Denmark, a constitutionally unitary state that includes the autonomous territories of the Faroe Islands and Greenland in the North Atlantic Ocean. Metropolitan Denmark is the southernmost of the Scandinavian countries, lying south-west and south of Sweden, south of Norway, and north of Germany, with which it shares a short land border, its only land border.

Gibraltar is a British Overseas Territory and city located at the southern tip of the Iberian Peninsula. It has an area of 6.7 km2 (2.6 sq mi) and is bordered to the north by Spain. The landscape is dominated by the Rock of Gibraltar, at the foot of which is a densely populated town area, home to over 32,000 people, primarily Gibraltarians.

Hungary is a landlocked country in Central Europe. Spanning 93,030 square kilometres (35,920 sq mi) of the Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and Slovenia to the southwest, and Austria to the west. Hungary has a population of 9.7 million, mostly ethnic Hungarians and a significant Romani minority. Hungarian, the official language, is the world's most widely spoken Uralic language and among the few non-Indo-European languages widely spoken in Europe. Budapest is the country's capital and largest city; other major urban areas include Debrecen, Szeged, Miskolc, Pécs, and Győr.

Italy, officially the Italian Republic or the Republic of Italy, is a country in Southern and Western Europe. Located in the middle of the Mediterranean Sea, it consists of a peninsula delimited by the Alps and surrounded by several islands; its territory largely coincides with the homonymous geographical region. Italy shares land borders with France, Switzerland, Austria, Slovenia and the enclaved microstates of Vatican City and San Marino. It has a territorial exclave in Switzerland, Campione. Italy covers an area of 301,230 km2 (116,310 sq mi), with a population of about 60 million. It is the third-most populous member state of the European Union, the sixth-most populous country in Europe, and the tenth-largest country in the continent by land area. Italy's capital and largest city is Rome.

Kosovo, officially the Republic of Kosovo, is a partially recognised state in Southeast Europe. It lies at the centre of the Balkans. Kosovo unilaterally declared its independence from Serbia on 17 February 2008, and has since gained diplomatic recognition as a sovereign state by 101 member states of the United Nations. It is bordered by Serbia to the north and east, North Macedonia to the southeast, Albania to the southwest, and Montenegro to the west. Most of central Kosovo is dominated by the vast plains and fields of Metohija and Kosovo field. The Accursed Mountains and Šar Mountains rise in the southwest and southeast, respectively. Its capital and largest city is Pristina.