The Bellows Falls Canal was the first canal built in the U.S. (1802), pre-dating the Erie Canal. https://www.hmdb.org/m.asp?m=74471

Canal Street (currently closed at one end as the new apartment building is being finished) is one of the oldest streets in BF and because it was built over a preexisting path used to portage barges and canoes, technically may be much older than the village.

The Adams Grist Mill is one of the best preserved water wheel grist mills I've ever seen. The horizontal water wheel is still in place under the building but went out of use in the early 1920s when the new hydroelectric plant came online. It's open for tours in the summer & fall: https://www.bellowsfallshistoricalsociety.org/gristmill