The directions said to go to Lock 21 and enjoy the persective as we crossed over a VERY narrow bridge over an operating lock. It was a few feet down to the water on one side, and a whole bunch of feet on the other side of this VERY narrow bridge. It wasn't quite an Indiana Jones kinda bridge, but it was narrow.
So when we got to Rome, we did what the Romans would do. We went out for a burger and a couple of beers!