Factual error: To my knowledge there is no metro in The Hague. And the only tram in the Hague that goes through a tunnel looks totally different.
Factual error: In the flashback to Whitman's first hit, that of the killer of a pastor, a rook is shown. This bird is not found in the US.
Factual error: There is no Dover-to-Amsterdam ferry service. Such a ferry would quickly cross the English Channel and then sail northeast along the coasts of France, Belgium and the Netherlands (passing The Hague on the way).