Hi Everyone, We are a group of women traveling to Switzerland and staying in Lucerne for 4 days in Sept. We are thinking of doing one excursion up into the Alps but don't know which one. There seems to be so many choices. Is it possible and feasible to travel from Lucerne to Grendwald then take the ride up to Jungfraujoch all in one day? Sounds like a lot. Any help would be appreciated.