- whc.unesco.org en/list/583/Suomenlinna (Sveaborg) is a sea fortress, which was built gradually from 1748 onwards on a group of islands belonging to the district of Helsinki.
- discoveringfinland.com blog/the-island-fortress-…Sweden lost the war, and seven centuries of its control of Finland came to an end, with Russia becoming the occupier of Suomenlinna.
- lonelyplanet.com finland/helsinki/attractions/…At Suomenlinna's main quay, the pink Rantakasarmi (Jetty Barracks) building is one of the best preserved of the Russian era.
- suomenlinnatours.com en/activities-at-suomenlinna…Suomenlinna Experience – short film. Once even called the Gibraltar of the North, Suomenlinna is one of the largest sea fortresses in the world.
- kids.kiddle.co SuomenlinnaAn aerial view of Suomenlinna. Location. Helsinki, Finland. UNESCO World Heritage Site. Official name: Fortress of Suomenlinna. Type.
- tr.wiki34.com wiki/SuomenlinnaSuomenlinna bugün. Bugün Suomenlinna, yaklaşık 850 nüfusu ve 350 işi ( turistik cazibesi nedeniyle yaz aylarında artan) ile Helsinki'de istisnai bir mahalledir.
- pointurier.org travel/finland/helsinki/…Suomenlinna Church, originally an orthodox church built by the Russians in 1854, and converted into an evangelical Lutheran church in 1929.
- turrehberin.com suomenlinna/Suomenlinna, Helsinki kıyılarındaki 6 ufak adanın üzerine kurulmuş olan bir kaledir. Bugün UNESCO Dünya Mirası Listesi içerisinde bulunan kale.
- triphobo.com places/helsinki-finland/suomenlinnaWhile the manmade side of Suomenlinna is certainly spectacular a lot is to be said about the natural vegetation of the islands as well.
- visit-plus.com finland/helsinki/attractions/…Suomenlinna is a military fortifications that were built on the islands at a distance of about 1 kilometer south-east of the center of Helsinki.