This is the scene inside the iconic Principality Stadium as it undergoes a remarkable transformation into a 2,000-bed field hospital to help fight the Covid-19 pandemic.
The newly named Dragon's Heart hospital will open to its first patients on Sunday, with 300 beds available for people suffering from coronavirus.
It's an unprecedented project, with the hospital designed and operational in under two weeks - a process that would normally take two years.
The stadium turf, which normally plays host to the Wales national rugby team has been taken up, and soon up to 700 patients will actually be treated on the pitch itself.
Giant tents will be erected to control the temperature inside the iconic stadium bowl, with around 2,500 staff expected to be working here when at full capacity.
The initial beds are being installed in the 115 hospitality boxes in the stadium, with the first available in the coming days.
As well as the main floor of the stadium, raised platforms are currently being built that will house another 200 patients.
Other huge spaces in the bowels of the stadium are also being used, including the home and away dressing rooms, which have already been turned into temporary offices. Even the police cell deep in the stadium, normally used to hold people arrested during events, is being utilised.
More than 18,000 bed pans will need to be emptied every day, 20,000 porter visits will be required daily to different parts of the hospital, three-and-a-half tons of clinical waste will be removed off site and hundreds of thousands of litres of oxygen will be brought to the venue.
A mobile CT scanner is also being delivered, along with four X-ray machines and a mobile laboratory.
In two-weeks time, the complete 2,000-bed hospital will be fully operational after a mammoth effort involving 5,000 hours of planning and work by around 650 contractors and 30 members of the armed forces who have been helping build beds.
It is expected to be operational for around three months, depending on how the pandemic develops and progresses.
The hospital will be the second biggest in the UK, after the Nightingale Hospital in London which was also set up to deal with the pandemic.
"This will be a place that we bring Covid-positive patients who are stable and are being taken through the last few days before we can get them home, said Professor Jonathan Gray, Executive Director of Transformation and Executive Lead for Dragon's Heart Hospital.
"It is going to be a place where hopefully lots of people will have a great experience before going home. We will be playing our part by freeing up the other hospitals to do the things they need to do."
The 2,500 staff being brought in will include 100 doctors, 500 nurses, plus volunteers, health care assistants, porters, catering staff and many who are returning to the medical profession from retirement.
Wing Commander David O'Reilly, clinical lead for the new hospital, said: "The response from colleagues and partners has been amazing.
"Building only actually started a couple of days ago and it was only the Sunday before we first met the consultants. It usually takes two years to design a hospital.
"I have never seen anything like this before. Nothing can prepare you for something like this."
Len Richards, chief executive of Cardiff and Vale University Health Board, added: "You can imagine, it was been 24 hours a day, seven days a week but it has been a fantastic effort from everyone.
"The hospital will be for those who have been through one of our other hospitals and may have been through critical care but are now recovering.
"It allows us to free up resources in those hospitals for the wave of patients expected. We will open beds up in a step-wise fashion, as we need them.
"We are thinking of being open for three months but we just don't know at this stage. We just have to be flexible."
