We went to see the Very Large Array.  It may look familiar if you saw the movie Contact.  Found out that SETI does not use this array. If they ever did find any Extra-Terrestrial Intelligence this would the be used to get a closer look.  The array is a big Y shape with each leg 13 miles long.  We had to turn off the cell phones while looking around. The effective width of the dish array is 27 miles.