Advancing armies have tried and failed on numerous occasions throughout history to breach its near-impregnable defences, so what chance does the average punter have, you may ask? Well, as it turns out, there are at least a dozen ways to gain free entry into Edinburgh Castle - and not one of them requires a siege engine or a battalion of angry musketmen..
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Andy Ritchie celebrates scoring.
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Pompey's only goal came from the penalty spot as did United's third courtesy of John Sheridan.
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A Neil Aspin goal earned the Whites the three points against The Shrews at Elland Road.
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The Whites were beaten for the third time against Oldham in less than a month.