Trivia: When Ben is talking to Riley in front of the Lincoln Memorial, you see a long pool behind them. This pool is filled with computer generated water, because the pool was drained at the time of shooting.
Trivia: In the scene where Ian (Sean Bean) is figuring out the clue, revealing Silence Dogood to him (when he realises this is a name), you see on the paper a few random doodles, including 3 pipes and at the top of the page two crossed swords, These swords are actually a reference to his favourite football (as is soccer) team Sheffield United, as the crossed swords are the team's symbol.
Trivia: The film shares a few interesting similarities with Lara Croft: Tomb Raider. Besides the fact that the main characters are both treasure hunters, Jon Voight plays the father of the main character in both films. Flashbacks featuring the main characters as children are also present in both films.