For the Season Finale of the first season of 80 Days, we’re going to do something a little different and look at a place that no longer exists: Kowloon Walled City. Once the most densely populated place in the planet, this unique, untamable settlement existed in Hong Kong, growing up from a military settlement which was originally built to demarcate the border between the British and Chinese controlled areas in the territory. It grew in size and scope to become a tightly-packed labyrinth of illegal activity and squalor, unregulated by either the Chinese or British governments. At its peak, over 30,000 people lived in the Walled City, resulting in a population density of approximately 1,255,000 inhabitants per square kilometre (3,250,000/sq mi). It was demolished in 1994, shortly before China retook control of Hong Kong, but has since become a cultural touchstone, a fascinating example of what humanity can become when allowed to run unchecked. Your hosts are Luke Kelly @thelukejkelly, Mark Boyle @markboyle86 and Joe Byrne@anbeirneach, in Hong Kong, the UK and Switzerland, respectively. (Theme music byThomas O’Boyle)

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