My wife and I are planning to go to Switzerland and Italy in September. We did some research on few places in Switzerland. We would like to go to places like Zurich, Interlaken, Geneva and take a train ride from either Chur to Zermatt OR St.Mrtiz to Zermatt. But we are confused on starting point as to which place to start from and end before we go to Venice in Italy. Can some one tell us what would be the order of places to visit from the list I provided?