Cities remains unique, universal and complex , invariably evolving, devolving, never finite and never defined. Cities create prosperity, poverty, employment, dichotomy and contradictions. Cities are said to be the future of humanity, but cities are also the reason for climate change, global warming , larger carbon footprints and rising temperature - making cities unsafe- both to the natural and manmade disasters. Making cities sustainable remains a challenge, opportunity, mirage and dream. Heading towards uncontrolled urbanisation, cities are pushing humanity into crisis- crisis of population, crisis of poverty and crisis of pollution. Cities remain anti-thesis to sustainability. Cities don't believe in inclusion and cities dies not treat majority of its inhabitants with respect and dignity -providing basic amenities of life to lead a dignified life. Making cities rational, humane, safe , inclusive, livable and sustainable will remain the greatest challenge on the planet earth.