Marietta's Castle is a huge Victorian mansion located at 418 Fourth Street. It was built in 1855 by Melvin Calvin Clarke, who later lost his life at Antietam. John Newton purchased it in 1860, then sold it to Edward White Nye, a newspaper editor, in 1887. In 1888 Nye died, leaving the house to his wife, who then gave it to her daughter, Lucy Nye Davis. Davis's daughter, Jessie Davis Lindsay, lived in the Castle for 87 years, dying five days before her 100th birthday.
The Castle is one of Marietta's better-known haunted buildings. A woman in period garb is often sighted there. During renovations, a member of the contruction crew sighted a figure through a window and refused to return to the job. The Castle is avaiable for tours and houses a museum of Victorian-era furnishings.