article_snippet: One of the most historic spots in the US, parts of the estate have been in the Washington family since the mid-17th century and it was at Mount Vernon that George Washington, the first president of the United States, lived.
article_snippet: Spectacular: The white marble monument is arguably the most famous in Washington D.C .
article_snippet: Next stop: The royal couple then toured the plantation home of George Washington's in Mount Vernon, Virginia .