香港！Kowloon Walled City was a densely populated, largely ungoverned settlement in Kowloon, Hong Kong. In the Walled City contained residents within its sq mi) borders
Yuri Gvozdenko is an illustrator and animator and some of his work includes scenes of Hong Kong and futuristic scenes of a cyber city where there will be such dense cities where bridges to different building will be necessary.
Hong Kong's Skyline -- Humans do make beautiful things sometimes, although there probably isn't much beauty to be found when the lights go out and daylight dawns, but I wont let reality Rob me of the joy of all the twinkly buildings!
Superb photo by [Unknown Photographer] -- black and white urban photography of apartment blocks and sky