What constructed feature spans a distance of 2021 miles from north to south across the state of Western Australia? The feature was built between 1901 and 1907. Alexander Crawford was one of the early inspectors of the feature. Inspectors used bicycles, camels, and automobiles to travel the terrain while inspecting the feature.
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It was fun to find this one:
http://en.wikipedia.org/wiki/Rabbit-proo…
http://en.wikipedia.org/wiki/Rabbit-proo…