Leonardo's "Golden Horn" Bridge is a perfect "pressed-bow." Leonardo surmised correctly that the classic keystone arch could be stretched narrow and substantially widened without losing integrity by using a flared foothold, or pier, and the terrain to anchor each end of the span. It was conceived 300 years prior to its engineering principals being generally accepted. It was to be 72 feet-wide (24 meters), 1080-foot total length (360 meters) and 120 feet (40 meters) above the sea level at the highest point of the span.

Further information about the Vebjørn Sand Bridge could be found at: http://www.vebjorn-sand.com/thebridge.htm