According to a site called Clonehenge at http://replicahenge.wordpress.com, The stone circle in Temple Wood is the earliest replica of Stonehenge. The site documents over 70 other replica stonehenge's around the world. I thought that this was very interesting, yet again we lead the world!
http://replicahenge.wordpress.com/2008/12/20/major-wests-stonehenge-built-c-1830/