World’s most dangerous prisons revealed where death and violence are part of daily life and cannibals.

World’s most dangerous prisons revealed where death and violence are part of daily life and cannibals, cartel leaders and paedos live side by side

The dangerous prisons span across Russia, Thailand and America

THEY are designed to house the worst of the worst, doling out punishment to hardened, violent criminals.

But some prisons have earned a reputation that is almost as bad as the thugs who are banged up there.

Here we look at some of the worst prisons still operating - and what makes them so dangerous.

It houses 700 of the worst - serial killers, cannibals and child molesters all kept under the same roof.

With more than 3,500 murder convictions between them, meaning the average inmate has been found guilty of five murders each, the brutality of its prisoners is enough to give the jail in the Orenburg region a terrifying reputation.

But the Black Dolphin has become notorious for its brutal techniques to keep its prison population under control, keeping its arrivals blindfolded, cuffed and held doubled over as they walk through the corridors.

Prisoners are not even allowed to rest or sit down during waking hours, surviving on soup and bread.

The only way to escape, according to one prison lieutenant?

Dying.

It is the place where prisoners go to die.

The Bang Kwang prison has housed more than 4,000 prisoners with at least 700 on death row as of 2009.

Inmates were previously shot, including by executioner Chavoret Jaruboon, until Thailand switched to death by lethal injection in 2003.

Prisoners must wear leg irons for the first three months of their sentence, fed only one bowl of rice soup a day.

Officially, this supermax prison is known as the United States Penitentiary, Administrative Maximum Facility.

Unofficially, it's called the Alcatraz of the Rockies.

Housing inmates including Boston bomber Dzhokhar Tsarnaev, Al-Qaeda operatives, double agents and cartel leaders the prison is known for its overpopulation and its harsh punishments.

Believed to be one of the most secure prisons, it often becomes the home of inmates transferred after killing inmates or prison staff.

Kept in 7ft by 12ft cells for 23 hours a day, the inmates barely see the light of day.

North Korea is shrouded in mystery, with its prisons just the same.

Kwalliso No 22 is completely isolated, keeping an estimated 50,000 prisoners locked up.

Their crimes vary from criticising the government to being politically unreliable, with entire families of perpetrators sent to the camp.

The inmates are never released.

One former guard revealed that prisoners were like "skeletons", beaten regularly with many subjected to water torture and kneeling torture.

Reports of human experimentation have also surfaced out of the camp.

It has been reported that the camp was closed down but satellite images have suggested some buildings are still in use.

Riots have broken out in this notorious prison, with the inmates separated between left-wing rebels and right-wing paramilitaries.

With prisoners easily accessing guns and even grenades, blood shed behind bars is common.

One of the worst examples is the death of 25 prisoners, killed on April 27 in 2000.

Chillingly, the remains of at least 100 dismembered prisoners and visitors were reportedly found in the drain pipes of the prison last year.

Thanks for reading.