It was still raining when we left the caves so we asked the info desk at the entrance what else was worth doing on a rainy day in the area and they said the "Slovenian Park of Military History".

It turned out to be a great recommendation.

The highlight of the visit was a tour inside the Sabotage Submarine P-913 Zeta. This thing looked like it was from the second world war or earlier, but was actually built in 1980 and remained in service til 2005...