HAUNTING footage shows the decaying ruins of the multi-million pound mega-mansions left abandoned on Billionaires' Row.

The ultra-exclusive road, officially named The Bishops Avenue in Hampstead, North London is a 66-house street boasting some of the most valuable properties in Britain.

19 The average price for homes on the street were over £1million in the late 1980s Credit: Cover Images

19 Luxurious pillars decorate this abandoned mansion's entrance Credit: Cover Images

19 The abandoned houses of Billionaire's Row could have a cumulative value of £350million - despite not being lived in for years Credit: SWNS

19 A warning sign appears on a gate that guards the abandoned mansion Credit: Cover Images

19 Wild plant life has reclaimed this collapsing staircase in one of the monster homes - a row of ten mansions on The Bishops Avenue have been completely empty since they were bought in the late 1980s and early 90s Credit: YouTube/Abandoned World Explorer

19 Huge columns support the rotten ceiling of this once lavish indoor swimming pool Credit: YouTube/Abandoned World Explorer

Urban explorers ventured into some of its gigantic empty houses, where cobwebs coat the walls and crumbling ceilings cover the previously pristine cavernous rooms.

Drained indoor swimming pools and gutted bedrooms lay untouched for years in the colossal wrecks — some of which have not been lived in for over a quarter of a century.

Average prices for homes on the street were over £1million in the late 1980s and one property there is currently on the market for £19million.

In 2014, a Guardian investigation found that 16 of the mansions on the road stood completely unoccupied, while many more were only used by their owners for short periods every year.

A resident told the paper: "Ninety-five percent of the people who live here don't actually live here. It is a terrible place to live really.

"It is very boring and the road is very busy. I don't think many people want to live in such big houses anyway."

The average house price in the UK is £230,776 which is 65 times less than the average £15million mansion on Bishop's Avenue.

19 Many of these mansions stand unused since they were purchased between 1989 and 1993 Credit: Cover Images

19 This particular mansion was adorned with French windows Credit: Cover Images

19 Credit: Cover Images

19 Many of the homes were reportedly registered to countries like the British Virgin Islands, the Bahamas and Panama Credit: Cover Images

19 Several of the formerly plush houses sit on large spaces of land which have also gone unkempt Credit: YouTube/Abandoned World Explorer

At the time, a third of all the mansions in the most expensive stretch of Billionaire's Row were empty — collectively worth around £350million.More than 120 bedrooms were empty in the vacant houses, leading one property owner, Anvil Varma, to dub the address "one of the most expensive wastelands in the world".

The hollow homes included a row of ten mansions worth £73million which had stood mostly unused since they were purchased between 1989 and 1993, reportedly on behalf of the Saudi royal family.

Other residents on the road have included the Sultan of Brunei, Heather Mills and Sir Billy Butlin — founder of the budget British holiday camps.

Billionaire Richard Desmond, former owner of Express Newspapers and founder of Northern & Shell which publishes Ok! magazine, also owned a mansion on the street.

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In 2016, it was reported that Justin Bieber was renting a historic 15-bedroom mansion on The Bishops Avenue for £108,000 a month.

And in 2008, the former President of Kazakhstan Nursultan Nazarbayev bought a home on the exclusive street for £50million, making it one of the most expensive houses in the UK.

Video of the mansions was filmed by Abandoned World Explorer.

19 An Iranian resident told the Guardian: 'Ninety-five percent of the people who live here don't actually live here. It is a terrible place to live really' Credit: Cover Images

19 The inside of the mansion is apparently covered in damp patches and rat droppings Credit: Cover Images

19 One resident on Billionaire's Row called the road 'one of the most expensive wastelands in the world' because of the empty properties Credit: YouTube/Abandoned World Explorer

19 The mansions have been left completely ruined and crumbling after being abandoned for a quarter of a century Credit: YouTube/Abandoned World Explorer

19 The once gleaming pillars and facade have been left to decay and crack as moss and weeds start to grow Credit: Cover Images

19 Redcroft mansion, pictured above, has been boarded up and left to rot Credit: Cover Images

19 A stained-glass window remains intact amongst the decaying ruins in one mansion Credit: YouTube/Abandoned World Explorer

19 More than 120 bedrooms have been left vacant in the empty houses Credit: YouTube/Abandoned World Explorer

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