Sadly these days the extensive estate is in a sorry state of disrepair. YouTubers svvk ventured inside the house recently to capture the forlorn interiors – this once-stunning swimming pool is now a sad shadow of its former grandeur. When Widener's son, George, and grandson, Harry, lost their lives on the Titanic, the estate fell to Peter's only surviving son, Joseph, who went on to curate one of the most important private art collections of Gilded Age European masterpieces in the world at Lynnewood.

See inside this Titanic survivor's $13m Illinois mansion for sale