If I know the journey is free with swiss pass, do I still need to show swiss pass to anyone before boarding? or Will I go straight to the train and have seat? How will I know if that seat is not reserved for someone else?
Also, I have another question. If I book a ticket from lets say, Grindelwald to Jungfraujoch. Can I get out of train at kleine scheidegg to take some pictures and then hop-in on next train? or Do I have to buy ticket again from kleine scheidegg to Jungfraujoch?
Thank you