Life inside Kowloon Walled City, the most densely populated place on earth, was far from easy before the chaotic cluster of interconnected high-rise buildings was demolished 20 years ago.
Around 33,000 people lived in the overcrowded Hong Kong slum, which was blighted by poverty, organised crime, including drug dealing, gambling and prostitution, poor sanitation and inadequate services.
Populated by families, business owners, drug addicts and gang members, the settlement was essentially lawless due to a territorial dispute between China and British Hong Kong, but both sides agreed in the 1980s to demolish it and replace it with a park.
The former Chinese military site became a sprawling urban settlement after Japanese forces retreated during World War II and squatters moved in.
Over the following decades it fell under the grip of the Triads, who were eventually forced out in the 1970s, and was notorious for brothels, casinos and opium dens as it lagged behind the rest of Hong Kong, although crime rates dropped in its later years.
Before Kowloon Walled City was finally demolished in 1994, photographers Greg Girard and Ian Lambot spent five years capturing jaw-dropping images of daily life within the six-acre site - from children playing on rooftops to heroin addicts shooting up on the street.
Little is known about North Korea, and maybe even less is known about the country's military. 
