Blennerhassett Island Historical State Park is located in the Ohio River near Parkersburg, West Virginia. The park features the historic Blennerhassett Mansion, built in the early 1800s by Harman and Margaret Blennerhassett. Visitors can explore the mansion, which showcases period furnishings and offers insights into the lives of the Blennerhassetts. The island is accessible by a sternwheeler boat, providing a scenic journey across the river. In addition to the mansion, the park includes walking trails, picnic areas, and a visitor center. It serves as a site for various educational programs and events related to the island's rich history.