My Lunch Box trivia question today had to do with something discovered on this day in history which one can actually see from outer space.  That was the big clue.  The fact that it was Captain Cook who discovered it in 1770 was also a pretty helpful clue.  (Answer below)  But first, let’s debunk a myth.  Is the Great Wall of China the only man-made structure visible from space?  Apparently not.  Astronauts have seen and photographed all kinds of things, from highways to bridges to parts of the Kennedy Space Center complex.  The man who first suggested that the Great Wall was the only man-made thing visible from space was one Richard Halliburton, adventurer and explorer but evidently not an astronaut.  He erroneously said that the Great Wall would be visible from the moon.  We know that to be untrue.  According to those who have been there, a lucky few, you really see very few details of the earth from the moon beyond a beautiful blue sphere.  As it should be.

Answer: Great Barrier Reef