This is a memorial for all of the unborn children who have been killed in America, roughly 1.4 million each year since 1972 when abortion was legalized for any reason at any point in a pregnancy up to the moment of birth.
It's in Groom Texas at the site of the second tallest Cross in the Western Hemisphere.
You can see a picture of the Cross at
http://www.pbase.com/trinko/image/76763603.jpg