We are traveling to Austria and Italy in May and would love to include a day or 2 in Switzerland. We're flying into Vienna and out of Venice. So far we have reserved 2 nights in Vienna, 3 nights in Lake Como, and 2 night in Venice. We have a couple of flex days in between Vienna and Como and are trying to decide where to spend the 2 days in between. We'd love to visit Switzerland, if possible. Any suggestions would be much appreciated.