In three days of July 1863 some fifty thousand men were killed, wounded or lost here — the bloodiest battle in American history. Burials were hasty and many of the dead were never identified. Gettysburg has been called the most haunted ground in the country since; the accounts cluster at Devil's Den and the Rose Farm, where people report hearing orders shouted at night and seeing uniformed figures walking where the lines once stood.

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Akershus Fortress

A medieval fortress and prison on the Oslo fjord, never taken by siege. Its dungeons gave rise to Norwegian legends of the dog Malcanisen and a faceless woman said to guard the cellars.