Lady of the Dunes

Lady of the Dunes (also known as Lady in the Dunes) is the nickname for an unknown woman whose dead body was discovered on July 26, 1974 in the Race Point Dunes, Provincetown, Massachusetts. Her body was exhumed in 1980, 2000, and 2013 in efforts to identify her and her murderer. The murder is unsolved. 
The case was featured on the television series "Haunting Evidence" in 2006.