This course on cities is taught by Ed Glaeser of Harvard through EdX. Prof. Glaeser is one of the preeminent researchers in urban economics of today.
Course Description from EdX.org:
CitiesX will give you a far-ranging look at the past, present and future of cities, with the aim of teaching you how to better understand, appreciate and improve urban areas. The course will explore key concepts of urban development by examining cities around the world, including London, Rio de Janeiro, New York City, Shanghai, Mumbai, Kigali, and many more.
This course is designed to be taken at your own pace, for 11 weeks at 4-7 hours per week.
Cost: Free, although you can buy a verified certificate for 99 USD if you want