gabion
101Castle — 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 …
102Scottish Parliament — For the national legislative body before 1707, see Parliament of Scotland. Scottish Parliament Pàrlamaid na h Alba 4th Parliame …
103Bunker — 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… …
104Defensive wall — See also: List of cities with defensive walls Part of the Great Wall of China, a UNESCO World Heritage Site …
105Overburden pressure — Overburden pressure, also called lithostatic pressure or vertical stress, is the pressure or stress imposed on a layer of soil or rock by the weight of overlying material. The overburden pressure at a depth z is given by where ρ(z) is the density …
106Moat — For information on the moat of a tropical cyclone, see eye (cyclone). For the gunman, see Raoul Moat. The moated manor house of Baddesley Clinton in Warwickshire, England A moat is a deep, broad ditch, either dry or filled with water, that… …
107Hill fort — Maiden Castle in England is one of the largest hill forts in Europe.[1][2] Photograph taken in 1935 by Major George Allen (1891–1940). A hill fort is a type of …
108Scorched earth — Not to be confused with Slash and burn. For other uses, see Scorched Earth (disambiguation). Kuwaiti oil wells set alight by retreating Iraqi forces in 1991. A scorched earth policy is a military strategy or operational method which involves… …
109Hydrometer — Not to be confused with Hygrometer. Hydrometer from Practical Physics Schematic drawing of a hydrometer. The lower the densi …
110Gravel — For other uses, see Gravel (disambiguation). Gravel (largest fragment in this photo is about 4 cm) …
