It was originally built in 1799 and was the birthplace of a plot to form a nation apart from the new American republic. The dishonored Aaron Burr who had killed his archnemesis Alexander Hamilton in a fateful duel was a part of the plot. The wealthy Blennerhassett family gave him their financial backing. To get to this beautifully restored mansion and estate you must take a sternwheeler riverboat from Point Park on 2nd Street in Parkersburg which is included in the admission price. Blennerhassett Island is open from the first of May until the end of October each year.