Kuivasaari

Isosaari (Swedish: Mjölö) is an island in Helsinki, part of the Ulkosaaret district of the city, more specifically of Itäsaaret, i.e. ‘eastern islands’. It was one of the fortified islands of the Gulf of Finland. Isosaari is one of the outermost islands in the Helsinki region, and it is a site that is important from the perspective of cultural history. Its sights and its nature are unique.

Vallisaari (Swedish: Skanslandet) is an island in Helsinki, Finland. It is located between Suomenlinna and Santahamina. The island has some ponds, and it was first known for hundreds of years as a place where sailors could take fresh water. Some fortifications were built on the island, but while neighbouring Suomenlinna became the main sea fort for Helsinki, Vallisaari was a supply point where cattle was grazing and firewood was collected.Sweden and Russia were at war in 1808 and the Russians besieged Suomenlinna, they used Vallisaari as their base. When ruling the Grand Duchy of Finland Russians began developing fortifications in Vallisaari. It was part of Krepost Sveaborg. After Finland gained its independence in 1917, weaponry of the Defence Forces was stored in Vallisaari until the 21st century. Ordnance, torpedoes, and mines were loaded and maintained; weather observations were made; and gas masks were repaired. There was some civilian population, too, which lead quite rural life farming on the island The civilian population was largest in the 1950s, when the island had even its own primary school.The Finnish Defence Forces gave up the islands in 2008 and Vallisaari was opened as tourism destination in 2016. Before the island was opened, vegetation has been cleared, stairs and railings build and info signs and dry toilets added. The plumbing is not in such a shape that it could be used any more.Now Vallisaari is the most diverse nature destination in the metropolitan area. The Russian history of the island is reflected in the plants, some of which were brought to the island with animal fodder. Military activities have kept the embankments and the meadows between fortifications open, thereby enriching the diversity of nature. Several rare insects and bats fly on the island.

Harmaja (Swedish: Gråhara) is an island and a lighthouse outside Helsinki, south of the Suomenlinna sea fortress. The island has been functioning as a landmark since the 16th century. A landmark structure was built on the island in the 18th century and a light house in 1883. The first lighthouse was only 7.3 m high and it soon proved to be too low. In 1900 the height was doubled by creating a rectangular brick building on a granite base. A large foghorn alerted ships in fog and in bad visibility. Harmaja received the world's first directed and undirected radio beacon in 1936. The lighthouse is fully automated today. There is also a pilot station on the island. During the 1952 Summer Olympics this was the center of the Olympic sailing event.

Walhalla is a restaurant located at the fortification walls on the island of Kustaanmiekka, the southernmost island of the Suomenlinna islands in Helsinki, Finland, founded in 1952. The restaurant was named after the Valhallaorden society which was active in Viapori in the 1780s. Nowadays Walhalla consists of three restaurants, including the evening restaurant Walhalla Gourmet, the pizzeria Nikolai and Aurinkoterassi & Bar. The courtyard of the restaurant is also used to host large events. Walhalla is open in summer starting from International Workers' Day, but also functions as a catering restaurant all year round.

Kuninkaanportti or Kungsporten (Finnish and Swedish respectively for "the king's gate") is the principal entrance to the fortress Suomenlinna (Swedish: Sveaborg) outside Helsinki. It is on the southernmost island of Suomenlinna, in front of the Kustaanmiekka strait, and is considered the main symbol of Suomenlinna. The gate was constructed from 1753 to 1754 at the place where King Adolf Frederick of Sweden anchored his ship when he was coming to inspect the construction of the fortress. The name "the king's gate" comes from this. The gate is a typical fortress gate with cannon openings. There are wide stairs leading to the gate, but in front of the gate is a drawbridge and a wide pit at both sides, to hinder climbing into the fortress. The gate was featured in the 1000 Finnish mark note in the last series, from 1986 to 2001. As a decoration, the sides of the gate feature four stone tablets which were written by the designer of the fortress, Augustin Ehrensvärd, in Swedish: Här har konung Fredrik låtit läggs den första sten år 1748 ("Here laid King Frederick the first stone in the year 1748") Och konung Gustaf har lagt den sista sten år .. ("And here laid King Gustav the last stone in the year", the year is left unwritten, because Gustav III never arrived to lay the last stone) Sveaborg som rörer hafvet på den ena sidan och stranden på den andra, giver den kloke herravälde på både haf och land ("Sveaborg (Suomenlinna), which touches the sea on one side and the shore on the other, gives the wise control both on sea and on land.") Ifrån ödemarker äro desse Vargskiärsholmar ombytte till ett Sveaborg. Eftervard, stå här på egen botn, och lita icke på främmande hielp. ("From desolate lands, these Wolf Islands have been transformed into a Sveaborg (Suomenlinna). Progeny, stand here on your own foundation, and do not rely on foreign help.")

Vesikko is a submarine, which was launched on 10 May 1933 at the Crichton-Vulcan dock in Turku. Until 1936 it was named by its manufacturing codename CV 707. Vesikko was ordered by a Dutch engineering company Ingenieurskantoor voor Scheepsbouw (a German front company) in 1930 as a commercial submarine prototype, being the prototype for the German Type II submarines. Purchased by the Finnish before World War II, she saw service in the Winter War and Continuation War, sinking the Soviet merchant ship Vyborg as her only victory. After the cease-fire with the Allies in 1944, Vesikko was retired. Finland was banned from operating submarines after the war and she was kept in storage until she was turned into a museum ship. Vesikko was one of five submarines to serve in the Finnish Navy. The other four were the three larger Vetehinen-class boats Vetehinen, Vesihiisi, Iku-Turso and the small Saukko. The word "vesikko" is the Finnish name for the European mink.

The Suomenlinna prison is an open prison in Suomenlinna, Helsinki, Finland, founded in 1971. It was previously known as the Suomenlinna penal colony. The prison is located at the southern tip of the island of Iso-Mustasaari. The prison was founded to help in the repair and restoration work of the Suomenlinna fortress; the prison co-operates with the Governing Body of Suomenlinna belonging to the Finnish Ministry of Education. Prisoners in the open prison, nicknamed Konnala (roughly translated as "Crook-land") work on weekdays in various jobs all over the island, under supervision. Most particularly they repair the buildings and stonework in Suomenlinna or maintain the scenery.In 2017 the average number of prisoners was 137. There are places for 100 prisoners. Prisoners at the Suomenlinna prison are usually near the end of serving their sentences. Some of the prisoners are also studying while serving their sentences.The prison employs about 30 people. The manager of the prison is Sinikka Saarela.

The Military Museum of Finland (Finnish: Sotamuseo) is the central museum of the Finnish Defence Forces and the national special museum of military history. It is located in Helsinki and it is part of the Finnish National Defence University. In 2018, the Military Museum's exhibitions in Suomenlinna had around 131,000 visitors. The most popular exhibition is the submarine Vesikko, visited by around 50,000 people annually. Military Museum's exhibitions in Suomenlinna are located at Manege and Artillery Maneage.The Military Museum's task is to collect, preserve, research and display artifacts and other heritage related to the development of the Defence Forces of Finland, Finland's military history and to the history of weaponry. As of 2016, the museum's exhibition locations at Liisankatu 1 and Maurinkatu 1 are closed.

Suomenlinna (Finnish: [ˈsuo̯menˌlinːɑ]; until 1918 Viapori, Finnish: [ˈviaˌpori]), or Sveaborg (Swedish: [ˈsvɛːɑˈborj]), is an inhabited sea fortress built on eight islands about 4 km southeast of the city center of Helsinki, the capital of Finland. Suomenlinna is popular with tourists and locals who enjoy it as a picturesque picnic site. Originally named Sveaborg (Castle of the Swedes), or Viapori as referred to by Finnish-speaking Finns, it was renamed in Finnish to Suomenlinna (Castle of Finland) in 1918 for patriotic and nationalistic reasons, though it is still known by its original name in Sweden and by Swedish-speaking Finns. The Swedish crown commenced the construction of the fortress in 1748 as protection against Russian expansionism. The general responsibility for the fortification work was given to Augustin Ehrensvärd. The original plan of the bastion fortress was strongly influenced by the ideas of Vauban, the foremost military engineer of the time, and the principles of the star fort style of fortification, albeit adapted to a group of rocky islands. Famous for these bastion fortifications, Suomenlinna became a UNESCO World Heritage Site in 1991.During the Finnish War, Sweden surrendered the fortress to Russia on 3 May 1808, paving the way for the occupation of Finland by Russian forces in 1809, and the eventual cession of Finland to Russia at the conclusion of the war. Russia held the fortress until Finnish independence in 1918. Finland then managed Suomenlinna through the Defense Department until turning most of it over to civilian control in 1973.

Suomenlinna prison camp (Finnish: Suomenlinnan vankileiri, Swedish: Sveaborgs fångläger) was a 1918 Civil War of Finland concentration camp in the Suomenlinna Fortress, Helsinki. It was established by the White Army for the Red Guard fighters taken prisoner after the Battle of Helsinki. The camp operated from April 1918 to March 1919. It was a subcamp for the Helsinki prison camp, which included the camps of Suomenlinna, Santahamina, Katajanokka and Isosaari.

Järvitaipalle Fortress is part of the fortifications of southeastern Finland, designed and built by General Alexander Suvorov, located in Savitaipalle, about 40 km from Kärnäkoski Fortress.

The Ehrensvärd grave is the final resting place and memorial of Augustin Ehrensvärd, the founder of the Suomenlinna island fortress in Helsinki, Finland, at the Linnanpiha yard on the island of Susisaari in Suomenlinna. Ehrensvärd was buried at the yard in 1783 but the memorial was only completed in its current form in 1805.After Ehrensvärd's death in 1772 king Gustaf III of Sweden gave an order that he should be buried at the yard at the heart of the fortress of Sveaborg (later known in Finnish as Suomenlinna). Construction of the tomb took eleven years, during which time the body of Ehrensvärd rested in a temporary grave at the cemetery of the Ulrika Elonora Church in Helsinki. Ehrensvärd's coffin was moved to Suomenlinna and placed into the fortress tomb on 5 July 1783 in a solemn event attended by the king himself.