The Seaplane Harbour (Estonian: Lennusadam) is a maritime museum in Tallinn, Estonia, which opened in spring 2012.

[3] The museum is located in the Tallinn aeroplane harbour, in a building originally constructed as a hangar for seaplanes in the area of Peter the Great's Naval Fortress.

[2] The main attraction in the museum is the 1936 submarine Lembit, which was ordered by Estonia from the United Kingdom, and has now been renovated to its original 1930s appearance.

The museum presents the history of Estonia as a maritime country in a modern visual language.

The museum has submarine and flight simulators, a pool where people can sail miniature ships and large aquariums to look at aquatic animals.