Alcatraz Island, popularly referred to as "Alcatraz" and "The Rock", is a small island in the San Francisco Bay in California. It is the location of the infamous but long closed federal penitentiary (1934 - 1963) that housed some famous criminals such as such as Al Capone, George "Machine-Gun" Kelly, Alvin Karpis, and Arthur "Doc" Barker.

Ghost hunters use a variety of tools and techniques to investigate alleged paranormal activity. While there is no universal acceptance among ghost hunters of the following methodologies, a number of these are commonly utilized by ghost hunting groups.

In 1884, a wealthy widow named Sarah L. Winchester began a construction project of such magnitude that it was to occupy the lives of carpenters and craftsmen until her death thirty-eight years later. The Victorian mansion, designed and built by the Winchester Rifle heiress, is filled with so many unexplained oddities, that it has come to be known as the Winchester Mystery House.

Summary: In December 1975, George and Kathleen Lutz and their children moved into 112 Ocean Avenue, a large Dutch Colonial house in Amityville, a suburban neighborhood located on the south shore of Long Island, New York. Thirteen months before the Lutzes moved in, Ronald DeFeo, Jr. had shot and killed six members of his family at the house. After 28 days, the Lutzes left the house, claiming to have been terrorized by paranormal phenomena while living there.

Few houses in San Diego are as historically important as the Whaley House. In addition to being the Whaley Family home, it housed a granary, the County Court House, San Diego's first commercial theater, various businesses including Thomas Whaley's own general store, a ballroom, a billiard hall, school, and polling place. Significant events, such as the siezure of the court documents and records in 1871, and the suicide of Violet Whaley in 1885 profoundly affected Thomas and Anna Whaley. These events, as well as the hangings which occurred on the property before the house was constructed, have suffused the Whaley House with an air of mystery and added to its reputation as something more than just California State Historic Landmark #65.