474 Essential Sicily; If Venice Dies; Casanova

A Sicilian tour guide lays out the essentials for exploring his distinctive sun-drenched island. Then a prominent Italian archaeologist discusses Venice's population decline, which continues even as crowds of tourists and cruise-ship passengers overwhelm Italy's most beloved city. And we'll get all the gritty details on the side of 18th-century Venice described so vividly by that infamous libertine, Casanova.

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