The Blithewold Mansion, Gardens and Arboretum is an arboretum of 13 hectares (32 acres), located at 101 Ferry Road, Bristol, Rhode Island, midway between Newport and Providence, Rhode Island, on Bristol Harbor with views over Narragansett Bay. It includes a mansion, with a 4 hectares (9.9 acres) lawn and over 300 species of woody plants in its arboretum and gardens, including both native and exotic species.