Mittelbau Overview Click here to view map of the Mittelwerk. The name Mittelbau refers to a complex of factories, storage depots, facilities and prisoner camps, some underground, that were used from August, 1943 until April, 1945 to manufacture and test the V-2 rocket near Nordhausen in central Germany.
A tunnel is an underground passageway, dug through the surrounding soil/earth/rock and enclosed except for entrance and exit, commonly 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.
Archaeologists at the world-renowned Maya site of Palenque in Mexico have made a surprising discovery beneath the Temple of Inscriptions, the impressive funerary monument built for Maya ruler Pakal – underground water tunnels that appears to have been created as a symbolic path to guide Pakal to the afterlife.
Each shelter consisted of two parallel tunnels that were 16ft 6in (approx. 4.9m) in diameter and were 1400ft (approx. 427m) in length. Two pairs of shafts were sunk for each shelter, with the pairs being sited a distance from each other in case a bomb struck, blocking a shaft.
Lying just below the surface of Manchester sits a complex network of underground tunnels. Several kilometres of subterranean passageways and spaces stretch under large parts of the city centre and beyond. These tunnels include the remnants of a tube station that never was, a communications bunker ...
A brief of history of lines. While many of central London's Underground stations have tunnels, foot tunnels and passageways that are no longer in use for various reasons, Euston's Underground station has more such tunnels than most, some that even contain features that are unique to the network.