Hiding amongst overgrown bushes next to a roundabout in one of Cardiff's most expensive suburbs is a slice of the capital's history that not many residents of the city even know exists.
Push through the undergrowth and an intriguing brown brick building peeps out from beneath its natural cladding of rampant leaves and vines.
It's the Cardiff County Council owned former civil defence control centre bunker, tucked away amongst the period properties of this popular area, and built as the nerve centre from which to coordinate local operations in the event of an emergency.
It was built in 1956 and remained operational until the Civil Defence Corps, who were stationed there, were disbanded in 1968.
Graham Tatnell spoke to WalesOnline in 2012 about his time as a member of the corps at this building, that he says could have been a cold war nerve centre should World War III have ever become a reality.
The former hospital technician from Rhiwbina said: "I know it was supposed to be for nuclear warfare.
"But no-one would have been any help if there was a bomb dropped, but we did flood relief and Aberfan and other disasters.
"When we finished, the chairman just shut the doors and left so all the things that we had were left there, including photos.
"It was sad that the place has deteriorated and it had obviously been vandalised."
From the year when the corps left in 1968 the building was run and looked after by volunteers until 1984 and then served as the county standby control room and used for storage until its doors closed for the final time in 1991.
Since then it has been dormant with just nature, wildlife and the occasional trespasser visiting, some of whom have sadly illegally helped themselves to items that Graham remembers were left in the building.
Find out more about that here.
It was reported in 2013 that the local Llandaff Society group were looking into turning the building on Vaughan Avenue into a Cold War museum.
Sadly, it appears that the extent of the damage caused by vandals and the elements is said to have been prohibitive to this suggestion ever becoming a reality.
One person who has been privileged to visit the bunker before the building's condition began to decline was author Nick Catford.
Thankfully he took photographs of the inside of the building to document this moment in time in 2003.
Nick specialises in researching and writing books on the intriguing historic buildings of Britain's past, including bunkers and tunnels as well as trains and railways, so he was the ideal person to capture the building as it was at the time of his visit.
Nick's incredible images of inside the bunker in 2003 give a frozen in time snapshot of the building's past.
He describes his visit on website subbrit.org.uk, saying: "There is a store room with Dexion shelving, still stacked with equipment, much of it dating from World War Two.
"There are a large number of tin helmets, stretchers, gas masks, dustbins, buckets, stacked tables, and a large quantity of small wooden blocks (unknown use).
Nick continues: "The adjacent room is also a store although it was originally the dormitory with bunk beds still in place along two walls.
"There’s more furniture here plus respirators and a wheelbarrow.
"Internally the bunker has changed very little since it was built and feels like a 1950s bunker as soon as you walk through the door."
Some of the documents Nick Catford saw that day, plus items removed at the time of the building's closure, have apparently been given to the Glamorgan Archive in Leckwith, Cardiff.
Now the bunker is going to auction with a guide price of £40,000 with Seel & Co.
The auction house describes the property as a single storey building of brick construction with a flat roof, one door and currently no window openings and extends to about 2,000 square feet in total.
Find your next perfect home here:
The building is arranged as a number of rooms of various sizes which in the past provided an office, control room, living and sleeping accommodation, referring back to the property's intended use.
The auction house selling the bunker says that the building may be suitable for a variety of uses, subject to achieving he necessary planning consent.
Find out more about other south Wales bunkers here.
The control centre bunker is for sale by online auction for a guide price of £40,000.
Bidding will open at 9.00am on Tuesday, February and the auction will close in lot order from 5pm, all via the Seel and Co website.
Please visit the website prior to auction for more details or contact the auction team on 029 2037 0117.
