* Marietta was the first settlement in the Northwest Territory, founded by the Ohio Company of Associates in 1788, and named after the French Queen Marie-Antoinette.
* The Muskingum River was crucial in the 1800s for travelers on the Underground Railroad and tours are offered at some sites.
* From spring through the beautiful autumn season, The Valley Gem Sternwheeler offers river cruises to visitors. The W.P. Snyder Jr., the only steam-powered sternwheel towboat still afloat in the United States, is moored behind The Ohio River Museum.