Welbeck Abbey. Photo: Stephen Ostler/Wikimedia Commons
In the quiet village of Welbeck, Nottinghamshire, lies a sprawling country mansion surrounded by 15,000 acres of land — Welbeck Abbey, home for generations to the Cavendish-Bentinck family.
The current owner and resident is William Parente, grandson of the 7th Duke of Portland, but it’s the 19th-century Duke, John Bentinck, who has left behind a legacy stranger than fiction.
John Bentinck, the 5th Duke of Portland, was no ordinary aristocrat. He was one of Britain’s greatest recluses who went to exceptional lengths to avoid all forms of human contact. The Duke’s eccentricities are the stuff of legend — and the sprawling Welbeck Abbey became his playground for some truly extraordinary architectural oddities.
Under his direction, the abbey was transformed with a vast underground labyrinth of tunnels and secret passageways connecting rooms and buildings across the estate. These weren’t just narrow crawlspaces — one tunnel stretched nearly a kilometre from the house to a horse riding school, wide enough for several people to walk side by side. Another, more ambitious tunnel was a carriage drive almost a mile and a half long, broad enough for two carriages to pass, complete with domed skylights and gaslight illumination by night.

Welbeck Abbey in 1829. Credit: Wikimedia Commons
Yet the Duke himself rarely used these tunnels. Instead, he preferred to live as a virtual ghost in his own home. He communicated with servants only through notes passed via a special message box cut into his door, and meals were delivered by miniature railway. When out and about, he was accompanied by a lady servant who carried a lantern 40 yards ahead to light his path. On rare daytime walks, he hid behind a large umbrella, dressed in two overcoats, a towering hat, and an impossibly high collar — all in an effort to avoid being seen or spoken to.
Servants were told to treat him like furniture — passing him without acknowledgment — and tenants on the estate knew better than to raise a hat or say hello. One worker who dared to do so was promptly dismissed.
Born William John Cavendish-Scott-Bentinck in 1800, the Duke wasn’t initially expected to inherit the title. But after his brother’s death, he became heir and eventually succeeded his father in 1854. His early life saw a brief military career and a short stint in Parliament, both cut short by ill health.

Despite his reclusiveness, the Duke was a considerate employer. At the height of his estate’s activity, 15,000 men worked under his direction. He provided umbrellas and donkeys to ease their commutes, installed a roller-skating rink near the lake (in addition to the one he had underground), and was known affectionately as “the workman’s friend.” His generosity extended to medical care and financial aid for workers’ families.
Inside the tunnels, the Duke had a library nearly 250 feet long, an observatory, a billiards room, and a ballroom measuring 160 feet by 63 feet — complete with a hydraulic lift to bring guests up from below and a ceiling painted to resemble a giant sunset. Remarkably, he never hosted a single party there.
Local legend long whispered about the “mad Duke of Portland” and his secret underground world, but the truth is far more fascinating. The Duke was no lunatic — he was a visionary who used his fortune to provide work and shelter for his community during tough times.
Far from the grotesque figure some imagined, he was a passionate horticulturist and horse breeder with a keen interest in exotic fruits and racing. In his later years, he lived quietly in a few rooms of his vast abbey until his death in 1879.
Today, the tunnels remain locked away, hidden beneath the estate and kept under wraps by management. But the public’s fascination with the underground marvels of Welbeck Abbey lives on, where one man’s solitude created a subterranean kingdom unlike any other.