Hi! I’ll be at Switzerland in august for 1 day (passing by from Colmar, France to Venice) and I want to take the Bernina Express from Chur to Tirano. I would like to know if it’s better to stay in Zurich (I’ll be arriving around 10:30am), visit the city and take the train to Chur next morning or going directly to Chur without visiting Zurich and stay there. Is it very crazy to try both in one day? I’ve never been in Switzerland and we are traveling with a senior (if it helps to get better advise). Thank you!