One of the most popular attractions of Suomenlinna Fortress Helsinki considered (Sveaborg), where there are museums and Suomenlinna Ehrensvärd museum of toys and dolls, as well as galleries, parks and the submarine "Vesikko ". In addition, the fortress is listed as a UNESCO World Heritage Site. Another important attraction of Helsinki is the Assumption Cathedral, a sample of Byzantine-Russian architecture, built in 1868 and located on the island of Katajanokka. Assumption Cathedral is the largest Orthodox church in Western Europe.

Considerable interest is the Lutheran Church Temppelinaukio, carved into the rock and covered with a glass dome through which its internal visits pouring sunlight.

Do not ignore the marine center Sea Life, located near the park Linnanmäki, with more than 50 aquariums and Zoo Helsinki Zoo, one of the oldest zoos in the world.