 | This article includes a list of general references, but it lacks sufficient corresponding inline citations .(April 2018) |
An erdstall is a type of tunnel found across Europe. [1] They are of unknown origin but are believed to date from the Middle Ages. A variety of purposes have been theorized, including that they were used as escape routes or hiding places, but the most prominent theory is that they served a religious or spiritual purpose. [1]
The word Erdstall is derived from the medieval forms of German Erde (earth) and either Stelle (place) or 'Stollen' ("mineshaft"). There are very few historical references – a document from 1449[ which? ] names the area above the tunnels as 'auf den erdstelln'.
Alternative regional names are "schratzlloch" (Bavaria), "zwergloch" and "grufen" (Austria), that carry the regional names for dwarfs that folk belief has connected them to. [ citation needed ]
Erdstalls are very low and narrow – they have a height of 1.0 to 1.4 metres (3 ft 3 in to 4 ft 7 in) and a maximum width of about 60 centimetres (24 in). [ clarification needed ] Additionally, they feature very tight passages connecting one tunnel to a lower tunnel called a "schlupf" (slip out), which are typically extremely narrow and impassable for some, as crawling under the slip hole, and then standing up to slide the shoulders through, is necessary to crawl into the higher tunnel.
There is only one narrow concealed entry point, with no second exit tunnel as is common with an escape tunnel system. Some tunnel systems feature loop tunnels at the end of a tunnel. Most tunnel systems are no longer than 50 metres (160 ft).[ citation needed ]
In his 2000 publication Die Regional-Typisierung der Erdställe, Herbert Wimmer created a rough classification system for varying types of erdstall: [2]
There is almost no archaeological material to be found in the tunnels, although erdstall tunnels exist in abundance in central Europe, with over 700 in Bavaria alone. This makes it highly unlikely that they were ever used as dwellings, such as a hiding place in times of war.[ citation needed ]
The archaeological evidence is so slim that even age determination is difficult. Coal from a fire pit at Bad Zell has been dated between 1030 and 1210. Coal from a heading in Höcherlmühle has been dated between the late 10th and mid-11th century. A slip passage at Rot am See has been enhanced with stones to make it narrower with the stone additions dated to between 1034 and 1268. Coal from Trebersdorf was dated 950 to 1050, coal from Kühlried was dated to 950 to 1160. Ceramics found in St. Agatha have been dated to the 12th century, which seems to be the latest date of usage.[ citation needed ]
Most erdstall sites are too narrow to be usable for general tourism. A bigger walkable site is the Erdstall Ratgöbluckn in Perg (Upper Austria) that is open to the public as part of the local museum of Perg. [3] The Erdstall am Kapellenberg in Großkrut (Lower Austria) was opened in 2007 to visitors of the Erdstallmuseum Althöflein. [4]
The Great Pyramid of Giza is the largest Egyptian pyramid. It served as the tomb of pharaoh Khufu, who ruled during the Fourth Dynasty of the Old Kingdom. Built c. 2600 BC, over a period of about 27 years, the pyramid is the oldest of the Seven Wonders of the Ancient World, and the only wonder that has remained largely intact. It is the most famous monument of the Giza pyramid complex, which is part of the UNESCO World Heritage Site "Memphis and its Necropolis". It is situated at the northeastern end of the line of the three main pyramids at Giza.
Underground hard-rock mining refers to various underground mining techniques used to excavate "hard" minerals, usually those containing metals, such as ore containing gold, silver, iron, copper, zinc, nickel, tin, and lead. It also involves the same techniques used to excavate ores of gems, such as diamonds and rubies. Soft-rock mining refers to the excavation of softer minerals, such as salt, coal, and oil sands.
A fogou or fougou is an underground, dry-stone structure found on Iron Age or Romano-British-defended settlement sites in Cornwall. The original purpose of a fogou is uncertain today. Colloquially called vugs, vows, foggos, giant holts, or fuggy holes in various dialects, fogous have similarities with souterrains or earth-houses of northern Europe and particularly Scotland, including Orkney. Fewer than 15 confirmed fogous have been found.
A tunnel is an underground or undersea passageway. It is dug through surrounding soil, earth or rock, or laid under water, and is perfectly enclosed except for the two portals common at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods.
An adit or stulm is a horizontal or nearly horizontal passage to an underground mine. Miners can use adits for access, drainage, ventilation, and extracting minerals at the lowest convenient level. Adits are also used to explore for mineral veins. Although most strongly associated with mining, the term adit is sometimes also used in the context of underground excavation for non-mining purposes; for example, to refer to smaller underground passageways excavated for underground metro systems, to provide pedestrian access to stations, and for access required during construction.
Souterrain is a name given by archaeologists to a type of underground structure associated mainly with the European Atlantic Iron Age.
RÉSO, commonly referred to as the Underground City, is the name applied to a series of interconnected office towers, hotels, shopping centres, residential and commercial complexes, convention halls, universities and performing arts venues that form the heart of Montreal's central business district, colloquially referred to as Downtown Montreal. The name refers to the underground connections between the buildings that compose the network, in addition to the network's complete integration with the city's entirely underground rapid transit system, the Montreal Metro. Moreover, the first iteration of the Underground City was developed out of the open pit at the southern entrance to the Mount Royal Tunnel, where Place Ville Marie and Central Station stand today.
Kaprun is a municipality in the Zell am See District in the province of Salzburg in Austria. Together with the neighboring city of Zell am See the town presents itself as the tourist destination and skiing area "Zell am See-Kaprun". Kaprun distinguishes itself from its larger neighbor at the lake, by offering all year access to the Kitzsteinhorn with its Top of Salzburg viewing platform at 3029 metres (9938') altitude and its glacier ski area that is open October through May.
The Fréjus Road Tunnel is a tunnel that connects France and Italy. It runs under Col du Fréjus in the Cottian Alps between Modane in France and Bardonecchia in Italy. It is one of the major trans-Alpine transport routes between France and Italy being used for 80% of the commercial road traffic.
Mittersill is a city in the federal state of Salzburg, Austria, in the Pinzgau region of the Alps. It is located on the Salzach River. It has a population of 5,408 as of 2011.
Timmelsjoch, is a high mountain pass that creates a link through the Ötztal Alps along the border between Austria and Italy.
Mine exploration is a hobby in which people visit abandoned mines, quarries, and sometimes operational mines. Enthusiasts usually engage in such activities for the purpose of exploration and documentation, sometimes through the use of surveying and photography. In this respect, mine exploration might be considered a type of amateur industrial archaeology. In many ways, however, it is closer to caving, with many participants actively interested in exploring both mines and caves. Mine exploration typically requires equipment such as helmets, head lamps, Wellington boots, and climbing gear.
Warren's Shaft is a vertical shaft next to the Gihon Spring, the main source of water of Bronze and Iron Age Jerusalem, discovered in 1867 by British engineer, archaeologist and military officer Charles Warren. The term is currently used in either a narrower, or a wider sense:
Georgian Railway LLC is the national railway company of Georgia.
Mysterious tunnels or "secret passages" are a common element of the local folklore tradition in Europe. Such tunnels are said to physically link prominent places such as country houses, castles, churches, ancient monuments and other, often medieval, buildings.
Kufstein railway station serves the city of Kufstein, in the Kufstein district of the Austrian federal state of Tyrol. Opened in 1876, it is an Austrian-German border station, close to the border between Tyrol and Bavaria.
Prandegg Castle is a ruined hill castle in Austria, near the village of Schönau im Mühlkreis in the Freistadt District.
In transport, tunnels can be connected together to form a tunnel network. These can be used in mining to reach ore below ground, in cities for underground rapid transit systems, in sewer systems, in warfare to avoid enemy detection or attacks, as maintenance access routes beneath sites with high ground-traffic such as airports and amusement parks, or to extend public living areas or commercial access while avoiding outdoor weather.
Tunnels are dug in types of materials varying from soft clay to hard rock. The method of tunnel construction depends on such factors as the ground conditions, the ground water conditions, the length and diameter of the tunnel drive, the depth of the tunnel, the logistics of supporting the tunnel excavation, the final use and shape of the tunnel and appropriate risk management. Tunnel construction is a subset of underground construction.
Underground construction refers to the construction of underground tunnels, shafts, chambers, and passageways, it is also sometimes used to describe the portion of traditional construction that takes place below grade.
| Authority control databases: National |
|---|
