subway architecture
http://www.designboom.com/weblog/cat/9/view/8346/subway-architecture.html
Design Around the World: Metro Maps | Webdesigner Depot
http://www.webdesignerdepot.com/2010/03/design-around-the-world-metro-maps/

Every city looks and feels unique. Regional culture, typography, dialect, local customs and many more factors play a part in defining a city’s differences.