The world around us evolves so fast it sometimes makes our heads spin. You can see this change in big cities and see the huge metropolitan cities emerging from nothing.
Take a look and you will see how much these cities changed in some decades.
Singapore: The 1960s vs. now
Hong Kong: The 1960s vs. the present
Fortaleza, Brazil: 1980 vs. now
Shanghai, China: 1990 vs. the present
Toronto, Canada: 1930 vs. now
Seoul, South Korea: 1950 vs. the present day
Nairobi, Kenya: The 1960s and now
Beijing, China: The 1940s vs. the present
Melbourne, Australia: 1920 and today
Dubai, UAE: The 1980s vs. today