Jim Schoonmaker had rented the place with his family last June, and by taking a few 360-degree digital photos inside, then linking them together, he had created a tour that included the roof deck, the bathroom, and the expansive living room with three big windows overlooking the Grand Canal not far from Piazza San Marco. It was a sunny day in the Italian city, and I wanted to walk out the front door and head for the closest gelateria.