Specialtrain on the Bietschtalviadukt between Hohtenn and Ausserberg on the marvelous BLS-Südrampe. There is a walkingtrail partly near the tracks. Here is the trail directly on the viaduct
BLS 465 013 and 465 018 with a southbound intermodal train. SLM and ABB built this lokomotives in 1997, max speed is 230 km/h and the power output is 9520 hp.