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| Rivers are very useful things, but they can also be a problem. They act as barriers. For centuries people have worked on ways to cross them. One way is by building a bridge. Here are some of the most famous. |
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| When rivers run through cities, then bridges are important. This is the River Seine. What is the city? | This is the Honshu-Shikoku Bridge in Japan. It is the longest single span in the world. It is 3,910 metres long with a 1,990 metre center span. |
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| The Glen Jackson Bridge crosses the Columbia River between Portland and Vancouver. How could large ships use this river? | Humber Bridge ... East Yorkshire England. It used to be the longest single span bridge in the world. |
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| The Pont de Normandie crosses the River Seine near Le Havre in France. Why is it so high? | The Interstate Bridge at Portland Oregon. There are actually two bridges side by side. How do you think ships pass? |
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| There is an old children's song written about this bridge. Do you know where it is? | This is Tower Bridge over the River Thames in London, England. How do ships get through the bridge? |
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| This Suspension Bridge spans 450 feet across and 230 feet above North Vancouver’s spectacular Capilano River. | This is the Golden Gate Bridge. You are standing at the San Francisco side. It was first opened on May 28, 1937. |
| If you would like to try your hand at bridge building then visit NOVA online. Here you have to choose which kind of bridge to use to cross a barrier. |
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