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	THINGS TO DO: Engineering Marvels New York’s canal system was a nationally and internationally significant work of engineering. Eighteen aqueducts carried the canal over rivers and ravines. These and other canal relicts, including old locks and bridges, are part of the allure of a visit to the Erie Canalway Corridor.   Examples of all four major phases of New York canal building can be found within the National Heritage Corridor:   Today's Erie (Barge) Canal (1918) With the advent of motorized vessels, New York State enlarged the towpath era canals to create the New York State Barge Canal System, authorized in 1903 and completed in 1918. The structures and channels of the Erie, Champlain, Oswego, and Cayuga-Seneca branches exist and operate today largely as they did when the system went into operation in 1918.   Enlarged Erie Canal (1862) More than half (46 of 72) of the locks built for the Enlarged Erie Canal and three quarters (24 of 32) of its aqueducts survive in some form and can be found in parks, fields, yards, and along highways between Albany and Buffalo.   Clinton's Ditch (1825) At least four of the 96 locks of the original Erie Canal, which opened in 1825, survive and are visible.   18th Century Canals One lock, and a portion of a channel first dug in 1792 are visible in Little Falls. Archeological remains of other locks and channel segments from that period have been discovered near Rome and German Flatts in the Mohawk Valley.	plan your visit/ canalway regions > Find Engineering Marvels throughout the Corridor.       learn/engineering > Find out more about canal construction.       What is that? Guide to Common Canal Structures > Visit our gallery to learn about some of the common things you'll see along the canal.