At the station inside the Jungfraujoch mountain, there is a glass wall through which you can look at a branch of the Aletsch Glacier. When we arrived, the fog parted, and for twenty seconds we beheld a magnificent panorama. After this briefest of clearings, our luck ran out, and a thick white soup constantly hung all around us.
We still went up to the observation deck of the Sphinx Observatory. The observatory is a hundred meters higher than the station, the highest in Europe. You get there on a very, very high-speed elevator. It's built like that so it can manage to transport all those countless crowds of tourists who want to visit the "top of Europe". It was nice out on the deck: despite the temperature being around zero, the frost bit gently, probably because of the fog. By the way, there's a high-quality webcam nearby, check it out: https://www.jungfrau.ch/webcams/top-of-europe-jungfraujoch/#/
We, on the other hand, didn't end up seeing anything because of the fog. All we had left to do was feed the highest-altitude birds in the world. These are Alpine choughs, which sometimes fly up to altitudes above 5 km, and have even been spotted on Everest. They aren't afraid of people, and gladly take food from your hands. For lack of the latter — from the trash cans of ski resorts and hotels. In Europe, they usually live below three kilometers, but who would pass up the chance to scarf down some chips! (Me)
The choughs, although exercising caution, gobbled up our supplies diligently. Just a dozen seconds or so, and the bird is ready to approach you. After that, it's a simple affair — it snatches the food and hops away along the railing. It repeats this until it's full.
The time until the last ride down was coming to an end. We no longer had time to visit the ice palace, where you could walk through rooms made of frozen water and admire transparent sculptures.
When we boarded the train, something shocking came to light. After asking for the fourth time, we found out: our Tageskartes actually do give a 50% discount. It turns out the ticket should have cost us 75 francs, not 150! Good thing we at least paid 45 on the way down, instead of 90. Even that was a joy! It's a pity we got to the truth so late, otherwise the thrifty guys would have come with us. On the other hand, there wasn't much to see on the glacier.
An hour later, we descended without incident to Lauterbrunnen, where we reunited with our prodigal friends.