When it was demolished in 1993-94, it was thought to be the most densely populated place on earth.
Once Japan surrendered from the city, the population dramatically increased with numerous squatters moving in.
By the early 1980s it was notorious for brothels, casinos, cocaine parlours and opium dens.
The city eventually became the focus of a diplomatic crisis with both Britain and China refusing to take responsibility.
The rooftops were also an important gathering place, especially for residents who lived on upper floors.
Parents used them to relax, and children would play or do homework there after school.
A place just like the rest of Hong Kong.
The government spent $2.7billion Hong Kong dollars in compensation and evacuations started in 1991.
Those who refused were forcibly evicted.
After four months of planning, demolition of the Walled City began on 1993 and concluded in 1994.
The park’s paths and pavilions are named after streets and buildings in the Walled City.
