What are the two ancient Indian cities and what is special about them?

The two ancient Indian cities often highlighted are Harappa and Mohenjo-Daro, both prominent sites of the Indus Valley Civilization. These cities are remarkable for their advanced urban planning, including sophisticated drainage systems, standardized brick sizes, and well-organized street layouts. They showcase the early development of trade, agriculture, and social organization in South Asia, reflecting a highly developed society around 2500 BCE. Their archaeological significance provides valuable insights into early human civilization and urban life.