Question: Why does the president ask Ben to look for the page 47 of the book for him if he, as president, has access to the entire book?
Question: Why does Ben need to find the city of gold to beat the kidnap charge? The President's story of "We got trapped and he saved my life" would work just as well without the discovery.
Question: At the end of the film there are a bunch of people in the lost city of gold. If the devices were busted up and didn't work any longer, how did they get the water out? Also, if there's not really a way in any more, how did they all get in?