After arriving in Interlaken, which was by far my favorite of the cities we visited, as well as where I stayed the longest, they took us on a tour to Jungfraujoch, which was over 11,000 feet up, and ridiculously cold at the top.
The trip to what is called the "Top of Europe" offered some spectacular views. We rode up in the modern cog wheel train that stopped at two intermediate stations, the Eigerwand (Eiger Wall) and Eismeer (Sea Of Ice), on way up. I will say this, the conductors are definitely efficient. At each stop, you have just enough time to snap some photos and go to the bathroom before they were hustling everyone back onto the train. Once we got to the top of the mountain, there was a 13.6 mile ice stream, an Ice Palace, and plenty of places to look at the snow-capped mountains of Switzerland. We were able to watch and take pictures from various vantage terraces and also do ziplinging, which I did for the first time ever.