Once considered American royalty, the Vanderbilt family epitomises the grandeur of the Gilded Age. Renowned for throwing lavish parties, they were also responsible for building some of the biggest and most sumptuous homes in the United States. One such property, Elm Court, is so huge that it's reported to span two towns.

Click or scroll on to take a tour of the remarkable residence and discover how it played a role in two of history's most important events...