Although the Wabash & Erie Canal rolled through Terre Haute in the 1800s, virtually no evidence of its existence is available today. That will change when Lock 47, part of where the canal once coursed ...

The video provides a basic summary of how locks work, including an explanation of the water saving basins used on the new locks at the Panama Canal.

As part of our Abandoned PA series, we visit a well-preserved canal lock in York County that hasn't been used in more than 130 years.