Venice's citizens and tourists pass through turnstiles, limiting the massive flows of tourists, to access or to exit the Calatrava bridge, in Venice, on May 1, 2018. - Venice's mayor Luigi Brugnaro introduced these turnstiles gates, at Piazzale Roma, outside the train station, and others crucial points of the city, as an attempt to manage the crowd, increase safety and free up the citys most clogged thoroughfares. Locals and regular visitors in possession of a Venezia Unica card would be allowed to pass through these gates, but anyone without the correct documents would be directed along other streets. (Photo by ANDREA PATTARO / AFP) (Photo credit should read ANDREA PATTARO/AFP via Getty Images)
