You will need seven days or one week in Interlaken to have the full experience of the Jungfrau Region. (But it is not the case all the time)
3 days are enough in Interlaken and in the Jungfrau Region. Get a detailed Interlaken itinerary for visiting the Jungfrau Region here.
This post will help you decide how many days to visit Nuremberg. (Get your sample 1-day, 2-day, and 3-day Nuremberg Itinerary here!)
The best way you can spend 1, 3 to 7 days in Interlaken & in the Jungfrau region. Get tips, practical information, sample itineraries & more
Get a sample lake Garda itinerary in this post (with tips, practical information, public transportation, and more!)
This post will help you decide how many days to spend in visiting Verona. Get a free 1, 2, 3-day Verona Itinerary at the end of the post.
Let this post help you decide how long you would stay in Lucerne. Also, get a free Lucerne Itinerary for 1, 2, & 3 days of a visit to Lucerne
There are 12 epic things to do in Lauterbrunnen. See how you can visit all of them from the these 1,2,3-day Lauterbrunnen itineraries
Discover the best sights, attractions, and activities in Bern (each with visiting information). Bonus: Efficient 1,2,3-day Bern Itinerary.
Three, seven, ten, and fourteen-day Switzerland itineraries (maps, destinations, best things to do, how long to stay, tips, and more!)