Admittedly it's no North Korea, but it is pretty cool. Any SimCity fan will probably recognize the
arcology, an awesome, big, self-contained, super-big community. Check this out:
In the foreground you can see the awesome
Kowloon Walled City. Between 1898 and 1997, Hong Kong was under British rule. Well, almost. All of Hong Kong except a very small military fort called Kowloon. China was allowed to maintain control over the fort so long as they didn't interfere with Britain's rule over the rest of Hong Kong. Over the next hundred years, people started moving in.
For a bit of perspective:
| SkyDome/Rogers Centre | Kowloon Walled City |
| area | 5.14 hectares (source) | 2.6 hectares |
| seating capacity/population | 46374 (football) | 50000 |
That's right, more people
lived in an area half the size of the SkyDome than the SkyDome can seat. That number of 50000 (probably an estimate) came in the mid-80s, just before the Chinese and British mutually decided to demolish the city. It was widely regarded as the densest urban area in the world. At that point, Kowloon Walled City was a pretty well self-contained place, but the Chinese and British feared that their standard of living was slipping behind the rest of Hong Kong.
The city probably could have been even more dense, if not for a restriction disallowing them from building buildings taller than 14 storeys (due to a nearby airport). The buildings in the city were not built by architects or engineers, but rather grew organically, with one building melding into the next, forming an ad hoc patchwork of staircases and winding hallways.
Check out
this page for a cross-section of part of the city.