OughtFour wrote:

For added adventure, consider taking a night train to Interlaken from Paris.

There's no night train to interlaken from Paris. Paris Interlaken takes
about 6 1/2 hour by train. The best option is to take the Paris - Berne
TGV and take a train to interlaken there. You could even spent a few
hours in Bern...

Krist