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• Tunnel of Eupalinos — The Tunnel of Eupalinos or Eupalinian aqueduct (in Greek: gr. Efpalinion orygma , Ευπαλίνιον όρυγμα) is a tunnel of 1,036 m length in Samos, Greece, built in the sixth century BC to serve as an aqueduct. The tunnel is the second known tunnel in… …   Wikipedia

• Dugout (shelter) — Dugout home near Pie Town, New Mexico, 1940. A dugout or dug out, also known as a pithouse, pit house, earth lodge, mud hut, is a shelter for humans or domesticated animals and livestock based on a hole or depression dug into the ground. These… …   Wikipedia

• Landslide mitigation — Landslides can be triggered by many often concomitant causes. In addition to shallow erosion or reduction of shear strength caused by seasonal rainfall, causes triggered by anthropic activities such as adding excessive weight above the slope,… …   Wikipedia

• tunnels and underground excavations — ▪ engineering Introduction        Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …   Universalium

• British hardened field defences of World War II — Hexagonal pillbox (type 22) British hardened field defences of World War II were small fortified structures constructed as a part of British anti invasion preparations. They were popularly known as pillboxes by reference to their shape.[1] Con …   Wikipedia

• Bunker — This article is about the military fortification. For other uses, see Bunker (disambiguation). Bunkers in Albania A military bunker is a hardened shelter, often buried partly or fully underground, designed to protect the inhabitants from falling… …   Wikipedia

• Donald J. Ruhl — Donald Jack Ruhl    …   Wikipedia

• Land mine — For other uses, see Land mine (disambiguation). Minefield redirects here. For other uses, see Minefield (disambiguation). Examples of anti personnel mines. From left to right: an M14, Valmara 69 (a bounding mine), and VS 50 …   Wikipedia

• Castle — This article is about medieval fortifications. For other uses, see Castle (disambiguation). For a list of all castles, see List of castles. For similar but unrelated structures in Japan, see Japanese castle …   Wikipedia

• 2011 Tōhoku earthquake and tsunami — 2011 Miyagi earthquake redirects here. For the aftershock that occurred on 7 April, see April 2011 Miyagi earthquake. 2011 Tōhoku earthquake and tsunami 東日本大震災 An aerial view of damage in the Tōhoku region with black smoke coming from the Nippon… …   Wikipedia

• First Battle of Maryang San — Part of the …   Wikipedia