Toblerone?

No 2 son (rt) has been in Switzerland for a watch fair.  In addition he and his chum (lt) have been making videos for a watch company and explored the ice caves (Extra) of the glacier near Zermatt for photo opportunities.  It looked more like fun than work . . .

[p.s. I've guessed where they are on the map :-), they're not my photos and they were taken a few days ago, but I've only just seen them.]