Need a day trip from out of Como/Bellagio

What’s up guys .. currently solo traveling and am in Bellagio. Unfortunately it’s a lot more mellow and small than I had imagined … there isn’t much to do here as a solo traveler and I’ve thought of visiting the other parts of the lake for the villas but I’m still here the day after tomorrow so I’d save that for then. Was wondering what city is nearby to take that has more interaction and activity for my liking as a solo traveler. Also does anyone know if I’m required to present anything/documentation to enter Switzerland or neighboring countries when I’m traveling via train? Vice versa also for re-entering Italy. Thanks

Need a day trip from out of Como/Bellagio