Leningrad Oblast in the context of "River Neva"

South Karelia (or Southern Karelia, Finnish: Etelä-Karjala; Swedish: Södra Karelen; Karelian: Suvi-Karjala) is a region of Finland. It borders the regions of Kymenlaakso, South Savo and North Karelia, as well as Russia (Republic of Karelia and Leningrad Oblast).

The Valdai Hills, sometimes shortened to Valdai, are an upland region in the north-west of central European Russia running north–south, about midway between Saint Petersburg and Moscow, spanning Leningrad, Novgorod, Tver, Pskov, and Smolensk Oblasts.

The Valdai Hills are a popular tourist destination, particularly for fishing. The towns of Ostashkov and Valday are also known for their historical associations.

The Karelian Isthmus (Russian: Карельский перешеек, romanized: Karelsky peresheyek; Finnish: Karjalankannas; Swedish: Karelska näset) is the approximately 45–110-kilometre-wide (30–70 mi) stretch of land situated between the Gulf of Finland and Lake Ladoga in northwestern Russia, to the north of the River Neva. Its northwestern boundary is a line from the Bay of Vyborg to the westernmost point of Lake Ladoga, Pekonlahti. If the Karelian Isthmus is defined as the entire territory of present-day Saint Petersburg and Leningrad Oblast to the north of the Neva and also a tiny part of the Republic of Karelia, the area of the isthmus is about 15,000 km (5,800 sq mi).

The smaller part of the isthmus to the southeast of the old Russia-Finland border is considered historically as Northern Ingria, rather than part of the Karelian Isthmus itself. The rest of the isthmus was historically a part of Finnish Karelia. This was conquered by the Russian Empire during the Great Northern War in 1712 and included within the autonomous Grand Duchy of Finland (1809–1917) of the Russian Empire. When Finland became independent in 1917, the isthmus (except for the territory roughly corresponding to present-day Vsevolozhsky District and some districts of Saint Petersburg) remained Finnish. Finnish Karelia was partly ceded to the Soviet Union by Finland following the Winter War (1939–1940) and Continuation War (1941–1944). In 1940–1941, during the Interim Peace, most of the ceded territories in the isthmus were included within the Karelo-Finnish SSR. However, since World War II the entire isthmus has been divided between the city of Saint Petersburg (mostly Kurortny District), as well as Priozersky District, Vsevolozhsky District and Vyborgsky District of Leningrad Oblast.

Ladoga Karelia (Finnish: Laatokan Karjala, Swedish: Ladogakarelen, Russian: Ладожская Карелия, romanized: Ladožskaja Karelija, Карельское Приладожье, Karelskoje Priladožje or Северное Приладожье, Severnoje Priladožje) is a historical region of Karelia, currently largely in Russia. Today, the term refers to the part of the Republic of Karelia in the Russian Federation comprising the south-west part of the Republic, specifically Lakhdenpokhsky District, Pitkyarantsky District and Sortavala District. This region is on the northern littoral of Lake Ladoga, which borders Olonets Karelia to the East, Leningrad Oblast (Karelian Isthmus) to the south-west and the North Karelia region of Finland to the west.

Fennoscandia (Finnish, Swedish and Norwegian: Fennoskandia; Russian: Фенноскандия, romanized: Fennoskandiya), or the Fennoscandian Peninsula, is a peninsula in Europe which includes the Scandinavian and Kola peninsulas, mainland Finland, and Karelia. Administratively, this roughly encompasses the mainlands of Finland, Norway and Sweden, as well as Murmansk Oblast, the Republic of Karelia, and parts of northern Leningrad Oblast in Russia.

Its name comes from the Latin words Fennia (Finland) and Scandia (Scandinavia). The term was first used by the Finnish geologist Wilhelm Ramsay in 1898.

Vyborg (/ˈviːbɔːrɡ, ˈviːbərk/; Russian: Выборг, IPA: [ˈvɨbərk]; Finnish: Viipuri, IPA: [ˈʋiːpuri]; Swedish: Viborg, IPA: [ˈvǐːbɔrj] ) is a town and the administrative center of Vyborgsky District in Leningrad Oblast, Russia. It lies on the Karelian Isthmus near the head of Vyborg Bay, 130 km (81 miles) northwest of St. Petersburg, 245 km (152 miles) east of the Finnish capital Helsinki, and 38 km (24 miles) south of Russia's border with Finland, where the Saimaa Canal enters the Gulf of Finland. The most recent census population of Vyborg is 72,530 (2021 census).

Vyborg was founded as a medieval fortress in Finland under Swedish rule during the Third Swedish Crusade. After numerous wars between the Russians and Swedes, the Treaty of Nöteborg in 1323 defined the border of eastern Finland, and would separate the two cultures. Vyborg remained under Swedish rule until it was captured by the Russians during the Great Northern War. Under Russian rule, Vyborg was the seat of Vyborg Governorate until it was incorporated into the newly established Grand Duchy of Finland, an autonomous part of the Russian Empire. Finland declared its independence from Russia in 1917, after which Vyborg became its second-most significant city after Helsinki, and represented internationally as its most multicultural city. During World War II, Vyborg's population was evacuated and the town was ceded to the Soviet Union. In 2010, Vyborg was conferred the status of "City of Military Glory" by Russian president Dmitry Medvedev.

Kymenlaakso (Finnish: [ˈkymenˌlɑːkso]; Swedish: Kymmenedalen; lit. "Kymi/Kymmene Valley") is a region in Finland. It borders the regions of Uusimaa, Päijät-Häme, South Savo and South Karelia and Russia (Leningrad Oblast). Its name means literally The Valley of River Kymi. Kymijoki is one of the biggest rivers in Finland with a drainage basin with 11% of the area of Finland. The city of Kotka with 51,000 inhabitants is located at the delta of River Kymi and has the most important import harbour in Finland. Other cities are Kouvola further in the inland which has after a municipal merger 81,000 inhabitants and the old bastion town Hamina.

Kymenlaakso was one of the first industrialized regions of Finland. It became the most important region for paper and pulp industry in Finland. Since the late 1900s many plants have closed, which has caused some deindustrialization, unemployment and population decline in Kymenlaakso, especially in those communities that were built around plants in Kouvola.

The Saint Petersburg metropolitan area is a metropolitan area that is centered around Saint Petersburg. It includes the entire territory of the federal city of Saint Petersburg and part of the territory of Leningrad Oblast. The metropolitan area extends for about 50 km (31 mi) from the center of Saint Petersburg.

The population of the Saint Petersburg metropolitan area is approximately 6.4 million people of the urbanized population (including St. Petersburg, Vsevolozhsky, most of Gatchinsky and Lomonosovsky Districts, and part of Kirovsky and Tosnensky Districts of Leningrad Oblast), and the remaining parts of the above municipal districts of Leningrad Oblast, including the Sosnovy Bor, whose area is approximately 12.6 thousand km². It is the second largest metropolitan area in Russia after Moscow.