Jul 4, 2015 - 5:21 PM
in reply to KL
<<"I will be taking the boat across River Thun. If I start at 11 will finish be able to finish 1 side within 2 hours. Kindly suggest whether Ishould visit Bern or areas around Thun / Spiez to spend half day.">>
The river that passes through Thun is the Aare River.
Not sure how you plan to fit a half day in if you spend two hours on the Lake of Thun (Thunersee.)
This may help:
There is a modest map on that page of their web site.
And, this time table for all Swiss rail and boat journeys. -
If you have not looked at a map yet, this one might have more detail than you need, but you can zoom in and out. And, if zoomed in, it shows public transport stations.
I would have no trouble spending half a day in Bern.