Pakistan inherits the riches of the Gandhara civilization. Pakistan has been under the influence of cultures that took pride in creating planned cities. For instance, the sewerage system in the ruins of Taxila demonstrates the engineering genius of the past civilizations. Urban areas contribute 78% of GDP. The pattern of urbanization across provinces exhibits large variation. More than half of the total population of the country is clustered in and around eight cities. Expanding middle class comprising young generation. Most smaller towns are located in the neighborhood of the 1 million plus towns and along the national highway. Over 63.7% of internal migrants move to urban areas.