Tour America's grandest castles, mansions and estates with these video travel guides of extravagant abodes built by some of the country's richest families. From Rockefeller's Hudson Valley estate to Trump's palatial Palm Beach getaway, the doors are open for a grand tour of the lavish decor, architecture and grounds of the great Southern plantations, Florida's estates, the mansions of Newport, Rhode Island, the Adirondack camps and the palaces of the Gold Coast.