UNEXPECTED SIGHTS ON A CANAL TOUR

1. The Dutch National Bank

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The vaults of the Dutch National Bank are sunk some 48 ft (15 m) below ground level. In the event of an alarm, they have been designed to allow the waters of the Singelgracht to flood into them.

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The exterior of the Dutch National Bank building

2. The Prison Bridge

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The Torensluis—the widest bridge in the city—spans the Singel on the site of a 17th-century tower. ...

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