2018 Ju-Air Junkers Ju 52 crash

The Tschingelhörner (also spelled Tschingelhoren) are a chain of mountain peaks in the Glarus Alps, located on the border between the Swiss cantons of Glarus and Graubünden. They are composed of several summits on a 1 km (0.62 mi) long ridge, of which the highest is named Grosses Tschingelhorn (2,849 m). The mountain is located between Elm and Flims, west of the Segnas Pass (2,627 m). East of the main summit is the Martinsloch, a 6-by-18-metre (20-by-60 ft) triangular breakthrough, or hole, through which the sun shines at particular times of the year. The mountain is part of the Swiss Tectonic Arena Sardona and is a UNESCO World Heritage Site.

Piz Segnas is a mountain in the Glarus Alps, located on the border between the cantons of Glarus and Graubünden. Piz Sardona is on the same ridge to the north, from where the Trinserhorn or Piz Dolf lies to the southeast. The Tschingelhoerner with the famous Martinsloch (hole of St.Martin) lies to the west, with the Pass dil Segnas between the two mountains.The mountain lies in the municipalities of Flims, in the canton of Graubünden, and Glarus Süd, in the canton of Glarus. The nearest settlements are the villages of Flims, to the south, and Elm, to the west. A path crosses the Pass dil Segnas between the two villages. The easiest access to the area is an aerial cableway to Fil de Cassons (not active since 2015)from Flims or the hike to this ridge lying southeast of Piz Segnas.On 4 August 2018, a Junkers Ju 52 aircraft, operating a sightseeing flight, crashed into the western flank of the mountain, killing all 20 persons aboard.

The Glarus thrust (German: Glarner Überschiebung) is a major thrust fault in the Alps of eastern Switzerland. Along the thrust the Helvetic nappes were thrust more than 100 km to the north over the external Aarmassif and Infrahelvetic complex. The thrust forms the contact between older (Helvetic) Permo-Triassic rock layers of the Verrucano group and younger (external) Jurassic and Cretaceous limestones and Paleogene flysch and molasse. The Glarus thrust crops out over a relatively large area in the cantons Glarus, St. Gallen and Graubünden, due to its horizontal orientation and the high local relief. Famous outcrops include those at Lochsite near Glarus (the town) and in a mountain cliff called Tschingelhörner between Elm and Flims (in the same cliff is a natural hole called the Martinsloch).

The Laaxer Stöckli (also known as Piz Grisch) is a 2,898 metre-high mountain of the Glarus Alps, located on the border between the cantons of Glarus and Graubünden in Eastern Switzerland. It lies approximately halfway between the Vorab and Piz Segnas. The Laaxer Stöckli belongs to the municipalities of Glarus Süd and Laax. The closest localities are Elm and Flims. The south side is part of the Flims-Laax ski area. A chairlift reaches La Siala at a height of 2,806 metres.

Piz Sardona (or Surenstock) is a mountain in the Glarus Alps, on the border between the cantons Glarus and St. Gallen. The 3,056 metre high mountain overlooks the valleys of Elm (Glarus) and Calfeisen (St. Gallen). Less than one kilometre south of the summit lies the tripoint (3,000 metres) between the cantons of Glarus, St. Gallen and Graubünden. The summit itself is the northernmost point above 3,000 metres in Switzerland. The massif is covered by a few small glaciers, the Sardonagletscher lying near the summit on the east side. Piz Sardona is in the Glarus thrust area, a geologic UNESCO world heritage site, named "Swiss Tectonic Arena Sardona". The Foo Pass lies to the north of the Piz Sardona and has a hiking trail from Weisstannen in St. Gallen to Elm in Glarus, forming part of the Alpine Pass Route between Sargans to Montreux.

Piz Dolf (Romansh) or Trinserhorn (German) is a mountain of the Glarus Alps, located on the border between the cantons of St. Gallen and Graubünden. Piz Sardona is to the north across a glacier, and to its west Piz Segnas. Both Piz Segnas and Piz Dolf show the line of the Glarus thrust in its upper part. The easiest access to the area is an aerial cableway to Fil de Cassons from Flims or any of various hikes to this ridge lying southeast of Piz Dolf. One route uses the ascent via Val Bargis (the path can be seen on the picture (right) crossing the southern face of Piz Dolf in vegetation).

The Foo Pass (German: Foopass) is a mountain pass of the Glarus Alps, located on the border between the Swiss cantons of St. Gallen and Glarus, at an elevation of 2,223 m (7,293 ft). It crosses the col between the peaks of Foostock and Piz Sardona.The pass is traversed by a trail, which connects the village of Weisstannen, in the canton of St. Gallen at an elevation of 1,004 m (3,294 ft), with the village of Elm, in the canton of Glarus at an elevation of 977 m (3,205 ft). The trail forms part of the Alpine Pass Route, a long-distance hiking trail across Switzerland between Sargans and Montreux.The alpine pasture below the pass on the St Gallen side is notable for its marmot colony.

The rockslide of Elm (German: Der Bergsturz von Elm) was a mining disaster in Elm, Canton of Glarus, Switzerland which killed 115 people and destroyed 83 buildings on September 11, 1881. The catastrophe was partially caused by the mining of slate, beginning after 1870, by impoverished farmers who sought an additional source of income. Being inexperienced with proper mining techniques, they destabilized the rock face until the final catastrophe. The miners undercut the mountain face to a breadth of 180 m, and already in 1878 first rock movements occurred. A geological commission to examine the increasing number of rockfalls visited the scene shortly before the catastrophe, but did not find any indications of an impending disaster. The loud noise of the rockfalls, break-offs and fractures were already heard during the Sunday service on the morning of September 11, 1881. In spite of this, next to nobody left the dangerous area – in fact, many spectators went to the affected area or climbed to the nearby hamlet Düniberg on the opposing face of the valley in the hope of enjoying a better view of the spectacle. In the late afternoon, after two smaller rock slides, 10 million cubic meters (353 million cubic feet) of slate broke off, travelled 2 km (1.2 mi), and destroyed 90 hectares (220 acres) of land. The slate mine was also completely destroyed. The event and its causes were chronicled in the same year by the local priest Ernst Buss and the geologist Albert Heim in their publication "Der Bergsturz von Elm".

Fil de Cassons (also known as Cassonsgrat) is a mountain in the Glarus Alps, located near Flims in the canton of Graubünden, Switzerland. The southern face is referred to as "Flimserstein", dominating the appearance of the town of Flims. In its east lies Bargis from where a valley leads to its north face, while to its western face the sliding surface tears off of the biggest visible landslide in the world, Flims Rockslide. Piz Dolf is lying to the north across the Bargis valley, and to its west Piz Segnas, both showing the tectonic line of the Glarus thrust in its upper part, a now UNESCO world heritage. The easiest access to Fil de Cassons is an aerial cableway from Flims to this ridge, that actually allows also walks and an alpine experience from the cablecar for people that would not dare to walk a steep mountain path. Walking on top you will easily identify the tectonic line under your feet, as rocks turn from greenish to bright light grey on top of the wide ridge. For hikers aiming for more than a walk, several routes reach the high plateau and the very wide ridge, among them a historic Via Ferrata called Pinut. One hiking route uses the ascent via Val Bargis and Scala Mola, the path that the cows are being sent up to graze in summer. If you stay at the base of the valley of Bargis, you will hike on a path leading more or less around Fil de Cassons from east to northwest before reaching its top.Being a ridge, there is very often hardly snow, allowing walks even in winter along at least one mile on Fil de Cassons.

The Foostock, also known as the Ruchen, is a mountain of the Glarus Alps, located on the border between the Swiss cantons of Glarus and St. Gallen. It lies north of Piz Sardona, on the range that separates the Sernftal from the Weisstannental.The Foostock lies between two passes that carry hiking trails between the cantons of St. Gallen and Glarus. The Foo Pass lies to the south of the Foostock and carries a trail from Weisstannen in St. Gallen to Elm in Glarus, forming part of the Alpine Pass Route between Sargans to Montreux. The less well known Riseten Pass lies to the north of the Foostock and links Weisstannen with Matt in Glarus.

Crap Sogn Gion (meaning Saint John's stone in Romansh) is a mountain (2,263 metres (7,425 ft)) and cable car station (2,216 metres (7,270 ft)) located near Flims in the Swiss canton of Graubünden. Regarding the definition used in the Alps by the Swiss Alpine Club it cannot be called a mountain (nor even a peak with a strict definition) but only a location at the end of a ridge descending from the Vorab in the Glarus Alps. As the location has no distinctive peak nor sudden drops in its gentle sides, it is absolutely not an impressive mountain but even more a very appropriate place to run a skiing resort. Comparing to other skiing resorts in Switzerland the missing neighbouring mountains to the south - which is the location of the giant prehistoric Flims Rockslide – make it even more exposed to the sun even at the sun's lowest orbit in deep winter. A very small hut of the Ski Club Flims was the first building on Crap Sogn Gion, still standing there although hardly noticed. From 1962 the area was accessible by platter lift, followed 1967 by the then biggest aerial cable car with cabins to hold as much as 125 passengers, which is still in use today along with several modernised chairlifts. A more recent aerial cable car was built to Crap Masegn, from where another gondola lift leads to the glacier at Vorab, which made the ski resort a safe one in regards of snow even in winters of poor snowfall. For a walk in summer you may find Crap Sogn Gion on Swisstopo Map 1194, Flims, in the 1:25'000 scale. National Maps of Switzerland are a set of official map series designed, edited and distributed by Swisstopo, the Swiss Federal Office of Topography.

Elm (Romansh: ) is a village, and former municipality, in the municipality of Glarus Süd and canton of Glarus in Switzerland. Elm lies in the valley of the Sernf river, and consists of the village of Elm itself, and the hamlets of Sulzbach, Schwändi, Müsli, Untertal, Vogelsang, Töniberg, Obmoos, Steinibach and Wald.