Thun is on the main train line from Bern to Interlaken and is well worth a stop. The Thunersee (Lake Thun) beautifully frames this amazing, historic town with its majestic castle. And who would have expected to see surfers (!) on the river!? Google it; it's a thing. We were only here for an afternoon but would love to come back for a longer stay someday. This would be the town.