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The Maginot Line was an extensive series of fortifications built by France through the 1930s to protect its eastern borders from German attack. Stretching for over 200 miles (322 km), and including massive...

An August 1940 photograph of a portion of the Maginot Line after being taken by German troops. The defensive system was built along France's eastern frontiers prior to the Second World War (1939-45) but was largely bi-passed...

A photograph of part of the tunnel network of the Maginot Line, the defensive system built along France's eastern frontiers prior to the Second World War (1939-45). From the Schoenenbourg fort, Bas-Rhin, France.

A diagram of a retracting gun turret of the Maginot Line, France's Second Woorld War (1939-45) defences along the border with Germany and Switzerland.

An example of a mixed gun retracting turret of the Maginot Line, the defensive system built along France's eastern frontiers prior to the Second World War (1939-45). Alsace region.

A photograph of an accomodation room of the Maginot Line, the defensive system built along France's eastern frontiers prior to the Second World War (1939-45). From the Schoenenbourg fort, Bas-Rhin, France.

The Yamanote Line is a loop rail line that runs around the central part of Tokyo. This map shows how the line developed over time.

Nashville, Tenn. Federal outer line, photograph by J. F. Coonley, 16 December 1864. Depicted here is the outer line of Union forces on the second day of the Battle of Nashville (15-16 December 1864), a...

An 1890 oil on canvas, The Line of Poplars at Moret-sur-Loing, by Alfred Sisley (1839-1899), the Franco-British impressionist painter. (Musée d'Orsay, Paris)

A geoglyph showing the Nazca Line Spider. The designs and lines created on the desert floor of southern Peru are known collectively as the 'Nazca Lines' and were made over several centuries between 200 BCE and 500 CE. Their exact...