It is worthy on the way back to stop about 2 stations before the final station in Zermatt and make the rest of this way down to Zermatt on foot. The view and a huge waterfall on the way will make the walk worthy!

hiking up to Gornergrad is fantastic - personally next time I will not go all the way up as it is almost a shock to the system after 4 hours of beauty walking and meeting all the tourists who arrived with the train. however still a great place

The historic Gornergrat railway takes around 30 mins to get to the top of the Gornergrat skiing area. From there you get a great view of the Monte Rosa mountain and all the others in that range. Fantastic skiing area, great for anyone low-intermediate to advanced. Great mountain restaurants along the various ski runs back to Zermatt.

Didn't register until I got to the top that I could hop on & hop off on the same return ticket. The conductor on the glacier express had been telling people that interail were not entitled to a discount for the Gornergrat, but I convinced him and it saved time avoiding the queue in Zermatt.