But in less than 20 years more than half of the world's ocean-going cargo vessels may be too large to pass through the canal's locks.

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Pass the Verona Canal, where gondolas effortlessly glide by, on your way to Campo Santo Stefano, a square that leads to a number of secretive Baroque courtyards and portico arches.

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We have Egypt where war vessels pass through its canal.

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Liverpool, the loser, retaliated by charging enormous dock dues on Manchester's cotton imports, so Manchester built a ship canal to by-pass Liverpool.

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