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Venice is world famous for its gondolas. Today however, they are mostly used by tourists. Or for ceremonies -- funerals, weddings. Local Venetians prefer to travel by modern ferries along Venice's major canals and between the city's islands. Faster, more convenient.
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Brace yourself for the bad news. Venice has no sewage treatment facilities. Untreated waste is immediately dumped into Venice’s canals. I witnessed first hand. Literally, flush. Floaties, from individual buildings. Romantic. But the tide comes and goes. More flushing, whisking stuff away into coastal waters and points beyond.
I'm walking, thanks. Still worth a visit though. Caution.