There is no river or canal public-transportation system in the USA, but there are many smaller, often state-run, coastal ferry services, which provide efficient, scenic links to the many islands off both coasts. Most larger ferries will transport private cars, motorcycles and bicycles.
The most spectacular coastal ferry runs are on the southeastern coast of Alaska and along the Inside Passage. The Great Lakes have several islands that can be visited only by boat, such as Mackinac Island, MI; the Apostle Islands, off Wisconsin; and remote Isle Royale National Park, MI. Off the Pacific coast, ferries serve the scenic San Juan Islands in Washington and Catalina Island in California.