Photoshop filter not included
The Abt rail system, developed in Switzerland in the 1880s, is a narrow gauge track that specializes in climbing inclines by using a 3rd track that is toothed.
The Oigawa Railway's Ikawa Line is the only Abt system in Japan.
Ironically the abt system isn't in the main photo
You mean the special toothed tracks? Yeah, I couldn't find a good photo with both the train and the tracks.