At home in the United States, Maggie never goes outside without a leash unless she's in our back yard. In Venice, where most dogs run free, we've normally kept her on a lead (except in our back garden, which she's found boring) to keep her from falling into canals, wandering into bakeries, and getting lost in crowds.
Recently, however, we discovered a perfect place for Maggie to run without getting herself--or us--into trouble: the Rio Terà San Tomà, which is a long, wide street behind the State Archives just north of the Frari Church. It's a dead-end street with very few pedestrians, and the only thing a dog owner has to worry about is the open door of a university foodservice building on one side. (Maggie has sniffed and approached the door a few times, but we've managed to keep her from venturing inside for a snack.)
In the video below, you can see Maggie's hair flying in a self-induced breeze as she runs back and forth between us with praise and snacks as rewards. You'll also hear an amplified adult voice and children's happy cries from a church or school carnival on the other side of a graffiti-covered wall at the rio terà's dead end.
(Trivia note: A rio terà is a street that was made by filling in an old canal. There are quite a few of these in Venice, and they're called "rio terà"--which literally means "earth canal"--to distinguish them from calli or ordinary streets.)