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The Brown Lady
This portrait of "The Brown Lady" ghost is arguably the most famous and well-regarded ghost photograph ever taken. The ghost is thought to be that of Lady Dorothy Townshend, wife of Charles Townshend, 2nd Viscount of Raynham, residents of Raynham Hall in Norfolk, England in the early 1700s.

Lord Combermere
This photograph of the Combermere Abbey library was taken in 1891 by Sybell Corbet. The figure of a man can faintly be seen sitting in the chair to the left. His head, collar and right arm on the armrest are clearly discernable. It is believed to be the ghost of Lord Combermere.

Tulip Staircase Ghost
Rev. Ralph Hardy, a retired clergyman from White Rock, British Columbia, took this now-famous photograph in 1966. He intended merely to photograph the elegant spiral staircase (known as the "Tulip Staircase") in the Queen's House section of the National Maritime Museum in Greenwich, England. Upon development, however, the photo revealed a shrouded figure climbing the stairs, seeming to hold the railing with both hands.

The Back Seat Ghost
Mrs. Mabel Chinnery was visiting the grave of her mother one day in 1959. She had brought along her camera to take photographs of the gravesite. After snapping a few shots of her mother's gravestone, she took an impromptu photo of her husband, who was waiting alone in the car. At least the Chinnerys thought he was alone.
Information recieved from: http://paranormal.about.com/library/weekly/aa101402a.htm
