Jan 30, 2014 - 6:49 AM
That depends on what you expect from the stop. If you want to go up a mountain with a lift and enjoy the view, you could do so in St. Niklaus (bus to Grächen), Betten, Fiesch or Andermatt. Mind the timetable of the lifts as they can be closed in April. Also you can get off on the Oberalp Pass. There's most probably still snow there. If you just want to enjoy a nice village or town then Münster-Geschinen (very small), Brig (old town center, castle), Distentis (monastery) and Chur (old town centre) would qualify.
Enjoy the trip, and feel free to post a report once you're back!