At the Swiss Transport Museum, we were able to visit Auguste Picard, a passenger sub built for the 1964 World Expo.
After many phases in its journey, this submarine was refurbished and renovated for the museum. Before that it was basically a rusted wreck, and before that, a research vessel for oil rigs.
Interestingly, there was a photo inside that showed how the submarine at some point had sails!
The visit to this submarine is difficult to come by, by the way. They run just a handful of tours every day, and each tour only takes 8 persons. We were lucky to join the day's last tour!
Photos (c) 2018 by Jari Arkko. All rights reserved.