Riffelberg is a railway station on the Gornergrat railway, a rack railway which links the resort of Zermatt with the summit of the Gornergrat. The station is situated west of the Gornergrat, in the Swiss municipality of Zermatt and canton of Valais, at an altitude of 2,582 m (8,471 ft) above mean sea level.

The Hotel Riffelberg is located at the station.
Wikipedia

See Bædeker Switzerland (1877) Route 66 page 287