Welcome to MariettaOhio.com. Here you will find all of the historical, beautiful, and adventurous attractions that Marietta Ohio has to offer. As the first Permanent settlement in the Northwest Territory Marietta Ohio offers many historical buildings, museums and monuments. If you and your family enjoy the outdoors, you will also want to visit Marietta. In Marietta you will find both the Ohio and Muskingum rivers to enjoy.