Jan 16, 2018 - 6:12 AM
Your son has picked the best country to have an adventure in. My first choice would be to concentrate on the Jungfrau region. There are any number of fun activities ranging from lazy paddle boarding on Lake Thun, to adrenaline producing Paragliding and bungy jumping in Grindelwald. There is the Cliff Walk at First above Grindelwald as well as the First Flyer and of course, the Jungfraujoch. www.jungfrau.ch/en-gb/grindelwaldfirst/
I don't know of any via Ferrata's at interlaken, but there are certainly some nearby. I would recommend taking a guided trip to make the experience smoother and more enjoyable. www.outdooractive.com/ en/via-ferrata-routes/interlaken/via-ferrata-routes-in-interlaken/5569842/
If you have a look at Outdoor Interlaken's website, you'll get a good idea of what the area has to offer. I have no direct experience of them, but they offer a wide range of activities. www.outdoor-interlaken.ch/en/summe r
For sight seeing, the Grindelwald Gletscherschlucht is interesting, as are the Trumellbach falls in the Lauterbrunnen valley (a few Kms away). On bad weather days, you could take the ferry to Thun, which is more interesting than Interlaken.
I hope this hasn't been too confusing. I do understand why your son is smitten with Switzerland, I was too at his age.
Last modified on Jan 16, 2018 - 7:22 AM by Chantal