When the worst floods since 1966 submerged the city of Venice in November 2019, the blame was laid on its incomplete mobile flood gates. They have been under construction since 2003 but were not ready in time to save the Italian city. But elsewhere in the Venetian lagoon, there was a different story to tell. In 1966, the coastal sides of Lido and Pellestrina islands also flooded, but this time they didn't.