Overlooking the Hudson River in Tarrytown, New York, is Lyndhurst, one of America’s finest Gothic Revival mansions. The architectural brilliance of the residence, designed in 1838 by Alexander Jackson Davis, is complemented by the park-like landscape of the estate and a comprehensive collection of original decorative arts.
BANNERMAN'S CASTLE is the Hudson Valley's most renowned ruin. On Pollepel Island (fabled for eerie happenings going back to the 1600's) and owned by the New York State Office of Parks, Recreation and Historic Preservation, the ruin is closed to the public, though in recent years, limited public access has been allowed through the Bannerman's Castle.
Lyndhurst stands apart from the other grand mansions along the Hudson River in New York because its room are all built to a smaller scale. Description from house-crazy.com. I searched for this on bing.com/images