10. Fonthill Castle in the Bronx
This medieval-style mansion was built by Shakespearean actor Edwin Forrest in 1852 overlooking the Hudson River. Now situated in the Bronx, the castle has served many functions under the jurisdiction of the College of Mount Saint Vincent. Built of cut stone masonry that the Landmarks Preservation Commission called “of the finest quality ,” the Fonthill Castle has five towers that surround a main central tower.