Winnekenni Castle was constructed in 1875 by Dr. James R. Nichols, a local physician and inventor. Originally a summer residence, the castle changed ownership multiple times before being acquired by the city and managed by the Winnekenni Foundation. Today, it serves as a venue for events and educational programs, offering tours to the public during certain times. With its distinctive granite exterior and rich history, Winnekenni Castle stands as a popular landmark, with its distinctive European-inspired architecture and occasional tales of paranormal activity.