MOUNT VERNON
'(<a href="http://www.j-archive.com/media/2008-09-29_J_15.jpg" target="_blank">Sarah of the Clue Crew reports from outside a circular barn at Mount Vernon, VA.</a>) Washington designed a <a href="http://www.j-archive.com/media/2008-09-29_J_15a.jpg" target="_blank">barn</a> in which horses ran in a circle to stamp on wheat as part of this process'
threshing