The deepest cave in the world is the "Lamprechtsofen-Vogelshacht" cave which can be found in Salzburg, Austria. The cave is 5,354 feet deep.

Used for water distribution, the Delaware Aqueduct in New York, USA is the longest tunnel in the world (as of 2010). Drilled through solid rock, it reaches a staggering 137 kilometres (85 miles) in length. More tunnel facts.

During the making of the the movie "Fight Club," actor Brad Pitt chipped his tooth. However, he did not get his tooth capped until after the movie was done filming as he thought it would look better chipped for his character.

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