Photographic artist Mike Mike has the hidden gem "Faces of the World" project. The project combines a photos of citizens of some of the world's biggest cities and creates a mash-up "average person." Most cities has both an average male and female citizen. The map page shows cities currently available for viewing and those coming soon.
The cultural trends seen in the composites are interesting. The only cities not having the average female are Istanbul, Ankara, and Damascus. The taboo limits on women are evident. Then for more curosity there is women's hair style. I have not noticed any spatial patterns but a more in depth study could define cultural zones of hair length. (Hat tip: Platial)