Estonian Maritime Museum in Tallinn has submarine too.
Submarine 'Lembit' is still floating!
In December 1934 the Estonian Government concluded a contract with the British shipyard Vickers-Armstrong to have two submarines built. Twin submarines 'Kalev' and 'Lembit' were festively launched at Barrow-in-Furness on July 7th, 1936 and the ensign of the Estonian Navy was hoisted on Lembit on May 14th, 1937.
Both submarines belonged to the Estonian Navy until Estonia was occupied by the Soviet Union in June 1940. During WW-II they both were complemented to the Soviet Baltic Fleet and participated in the war with replaced crews; Kalev hit the mine on October 30, 1941.
The submarine Lembit, which was serving as a museum ship at Soviet navy museum, was brought back to Estonia on April 27, 1992 with the support of Estonian naval veterans and the sea museum. Finally after 52 years the Estonian flag was raised again on Lembit.
In 2001-2004 she was significantly repaired and restored and stands now in Air Harbour (Lennusadam, former base of seaplanes) with other museum ships.
Bitter, but Estonian Maritime Museum's website doesn't have proper information for english-speakers. But the address is
http://www.meremuuseum.ee
I visited submarine in 2001 just before restoration and sadly did'nt have any camera with me. I'm planning to visit it again during next month, now fitted with digital camera
Anyway - some images of sub I found on the net:
Lembit now -
http://www.online.ee/~peeprada/lembit/ekskurs.html
Cross-section -
http://www.online.ee/~peeprada/lembit/m6te.html
Historical pre-war photos -
http://www.online.ee/~peeprada/lembit/prewar.html
Annotations are in Estonian - sorry!