In 2003, the estate was added to the Preservation Alliance for Greater Philadelphia, a list of endangered historic properties. It officially became the property of the Lynnewood Hall Preservation Foundation in June 2023, who have prepped the house for a massive restoration to ensure its future. Yet there’s one final secret inside this iconic home.

Leland Kent of Abandoned Southeast stumbled upon a mysterious underground tunnel, deep in the basement. Little is known about the clandestine passageway, and it's not clear what exactly it was used for. Widener's 37 permanent staff members may have used it to navigate the house, out of sight.

Liked this? Click the Like button above. And click the Follow button above for more great stories from loveMONEY

12 hauntingly beautiful mansions that have been left to ruin