1 . What happens when you want to go from one place to another, but there's water in the way？That's the problem people faced for hundreds of years in the area that is now New York City. In the city, there is a natural canal called the Narrows, separating Brooklyn on one side from Staten Island on the other.

But the Narrows isn't really so narrow. The water is almost a mile wide, and it's more than 100 feet deep.     1     When they wanted to talk to each other, they climbed into their boats and sailed across.

By the late 1800s, circumstances had changed dramatically. Population growth meant there were now many people needing to travel between Staten Island and Brooklyn for work.     2    

Between 1888 and 1920 there were two major efforts to build a train tunnel to connect the areas.     3     Proposals to build a connecting bridge made during the 1910s also ended in failure due to opposition from the US Navy.

Finally, after World War II, there were so many people living in New York City that leaders decided Brooklyn and Staten Island needed a direct connection. Since tunnels were too expensive, they decided to build a bridge. The design selected had two separate roadways stacked on top of each other.     4     Construction, which took five years, was completed in 1964 and cost $320 million. Today about 190,000 cars and trucks cross the bridge every day.

    5     But in the case of the Narrows, figuring out a good solution took hundreds of years.