Riffelsee

Rotenboden 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 2,815 m (9,236 ft) above mean sea level, it is the second highest open-air railway station in Europe, after the Gornergrat railway station, on the same line.From the railway station a trail leads to the Monte Rosa Hut, across the Gorner Glacier.

The Riffelhorn (2,928 m) is a mountain in the Swiss section of the Pennine Alps, located south of Zermatt in the canton of Valais. The Riffelhorn forms part of the Gorner ridge and provides excellent rock climbing facilities having several routes of a different Climbing grades. It has been used a long time by the local Alpine guides to train rock climbing skills for climbers before ascending on higher mountains. It is also very popular view point being in the middle of one of the most famous valleys in the Alps, between the Matterhorn and Monte Rosa. Also the altitude of nearly 3,000 m gives a needed atmosphere of Alpine conditions. Nearest access is Rotenboden train station. Gornergratbahn continues from here up to summit of Gornergrat. On the northern side of the mountain lies the Riffelsee.

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. It is the third highest station on the line and, considering only open-air railway stations, the third highest in Switzerland and Europe as well. The Hotel Riffelberg is located at the station.

The Sunnegga Paradise is a ski area that forms part of the Zermatt ski resort, in Valais, Switzerland. The area relating to skiing is found on the Rothorn mountain, above the town of Zermatt. The trails extend to the valley floor between the Rothorn and Gornergrat mountains, and includes the ski runs directly down to the Oberhausern area of the town of Zermatt, terminating at the passenger lift that takes skier directly down inside the funicular train station in the area. The Sunnegga area catches a large amount of sun due to its unique topography, often despite the rest of Zermatt being submerged in cloud.

Gornergrat is the upper terminal railway station of the Gornergrat railway, a rack railway which links it with the resort of Zermatt. The station is situated at the summit of the Gornergrat, in the Swiss municipality of Zermatt and canton of Valais. At an altitude of 3,089 m (10,135 ft) above mean sea level, it is the highest open-air railway station in Europe.Near the station is the Kulm Hotel, a hotel and observatory.

The Telescopio InfraRosso del Gornergrat (TIRGO), or the Gornergrat Infrared Telescope, was located on the northern tower of the Kulm Hotel at Gornergrat (3,135 metres (10,285 ft) altitude) near Zermatt, Switzerland. It was a 1.5-metre (4.9 ft) Cassegrain telescope with a tip-tilt correcting secondary and optimized for infrared observations, but was decommissioned in March 2005. The telescope and related instrumentation were run by the Istituto di Radioastronomia (IRA - C.N.R.), sezione di Firenze (former CAISMI), with the assistance of the Osservatorio Astrofisico di Arcetri and the Dipartimento di Astronomia e Scienza dello Spazio of the University of Florence.

The Gornergrat Kulm Hotel is a hotel and observatory located on the Gornergrat, at 3,120 metres above sea level. It can be reached from Zermatt via the Gornergrat railway, the terminus station being located 100 metres away. The hotel includes an observatory, two restaurants and a small shopping mall. A first hotel was built on the Gornergrat in 1896, two years before the completion of the Gornergrat rack railway. As the tourist traffic increased, the current larger hotel was built between 1897 and 1907. Given the clean air and good light conditions of the area, a dome was built on each of the two towers of the hotel in 1996. The KOSMA telescope was installed in the southern tower while the Gornergrat Infrared Telescope was installed in the northern tower.

Riffelalp is a hamlet in the municipality of Zermatt in the canton of Valais. It is located at a height of 2,222 metres (7,290 ft) above sea level, just above the tree line, approximately halfway between the town of Zermatt and the Gornergrat mountain. Once the site of the prestigious Riffelalp Grand Hotel, today Riffelalp mainly consists of a large hotel complex, the Riffelalp Resort 2222m, and a chapel. Riffelalp is connected to Zermatt by the Gornergrat railway, although Riffelalp railway station is located some distance from the resort. The 675 metres (2,215 ft) long Riffelalp tram links the two together.

The Riffelalp tram (German: Riffelalptram, RiT) is a high altitude tramway line located in the Swiss canton of Valais near the resort of Zermatt. The line links the Riffelalp Resort to Riffelalp station, on the Gornergrat railway, and via that line to Zermatt and beyond. The Riffelalp tram is the highest tram line in Europe.

The Gornergrat (English: Gorner Ridge; 3,135 m (10,285 ft)) is a rocky ridge of the Pennine Alps, overlooking the Gorner Glacier south-east of Zermatt in Switzerland. It can be reached from Zermatt by the Gornergrat rack railway (GGB), the highest open-air railway in Europe. Between the Gornergrat railway station (3,090 m (10,140 ft)) and the summit is the Kulm Hotel (3,120 m (10,240 ft)). In the late 1960s two astronomical observatories were installed in the two towers of the Kulmhotel Gornergrat. The project “Stellarium Gornergrat” is hosted in the Gornergrat South Observatory.

Riffelalp 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 2,211 m (7,254 ft) above mean sea level.The station is linked to the five-star Riffelalp Resort by the 625 metres (2,051 ft) long Riffelalp tram, making Riffelalp the highest location in Europe where two distinct railways meet.

The Kölner Observatorium für SubMillimeter Astronomie (KOSMA) was a radio telescope for submillimeter astronomy located at 3,135 m (10,285 ft) on Gornergrat near Zermatt (Switzerland). It was operated by I. Physikalisches Institut, University of Cologne, and Radioastronomisches Institut, University of Bonn.The telescope had a primary diameter of 3 m (9.8 ft), and a secondary diameter of 0.27 metres (0.89 ft). It was equipped with heterodyne receivers covering 210 to 820 GHz, corresponding to wavelengths between 0.35 and 1.4 mm, for observations of lines from the interstellar medium.Because of the good climatic conditions at the altitude of 3135 m (10285 ft), astronomical observatories have been located in both towers of the Kulmhotel at Gornergrat since 1967. In 1985, the KOSMA telescope was installed in the southern tower by the Universität zu Köln and, in the course of 1995, replaced by a new dish and mount. In the northern tower, a 1.5 m infrared telescope was operated until 2005 by an Italian association of universities (TIRGO). In 2010, the telescope was moved to a site in Yangbajain in Damxung County in Tibet at an altitude of 4300m and renamed CCOSMA.