Category: Tentative Lists [Tentative Lists] Mount Vernon <a href="http://whc.unesco.org/en/tentativelists/5245">http://whc.unesco.org/en/tentativelists/5245</a> The property consists of a core of 16 surviving 18th-century structures situated within a cultural landscape of associated gardens, fences, lanes, walkways, and other features, situated along the Potomac River.