8 Then-And-Now Photos Show How Much Famous Cities Have Changed.
Over the years, humankind has made advancements in technology, science, and the arts. We've also done a stellar job at improving upon our architectural ambitions, with skyscrapers growing higher and higher with each passing decade.
This is certainly apparent in the world's largest cities, whose skylines have changed completely over the years. Below are some stunning before-and-after shots of the world's most developed and populated cities -- you're not going to believe what Toronto looked like all those years ago.
New York City
Rio De Janeiro