A great industrial center, Toledo is one of the world's busiest freshwater ports, ranking third on the Great Lakes. The city's importance as a port stems from its location at the mouth of the Maumee River, the largest river flowing into the lakes. Its natural harbor has 35 miles of frontage. Pipelines for crude oil and gas terminate in Toledo, which is a major refining center. The city also is a large producer of glass. Learn More...