I just came back from a mini-vacation where I visited the Naval Museum in Karlskrona, Sweden. The centerpiece in the Submarine Hall is HMS/HSwMS Neptun, a Näcken-class SSK (SSP after mid-life upgrade added Stirling AIP) active between 1980 and 1998. It's cool that you get such a good look at the interior.
Pics here:
https://imgur.com/gallery/n3VSvzc