Launched into the Baltic on 7th October 1968 from a slipway in Leningrad (now reverted to its original name of Saint Petersburg), the Foxtrot-class Soviet sub B-413 patrolled within the 4th submarine squadron of the Red Banner Northern Fleet between 1969 and 1990. Just over 90 metres in length, armed with 22 torpedoes and capable of staying submerged for up to 5 days, this and it's 57 sister subs which were built over a period of 14 years from 1957 to 1971 played a massive role in the so-called ‘Cold War’ between the USSR and the US.

Decommissioned in 1999, B-413 has been on display at the World Ocean Museum since 2000 and together with the “Vityaz” research vessel is an absolute must if you're down here. Unfortunately, while there are plenty of fascinating-looking info boards throughout the vessel, only the compartment names are in English at the moment. Nevertheless, the chance to roam about an excellently-maintained Soviet sub is worth every rouble in our book.