Swim Across The Atlantic Ocean

That's what you would have to do when you ask Google Maps for directions considering the starting point is in the USA and you want to go to an European city, for example.

• Go to the website
• select Get directions
• enter NYC into the Start address
  
• enter London into the End address
• press the Get directions button
  

That will tell you to "Swim across the Atlantic Ocean, 3462mi". I'm going to London, who is coming with me ;-)

[2007/08/06] Unfortunately this "feature" does not work anymore :-(