The Harappan Civilization, also known as the Indus Valley Civilization, was a Bronze Age society that flourished from roughly 3300 to 1300 BCE in the basins of the Indus River. Renowned for its sophisticated Urban Planning, standardized weights, and a largely undeciphered script, it was one of the world's three early cradles of civilization. Its major cities, like Mohenjo-Daro and Harappa, showcased advanced hydraulic engineering and a distinct, uniform culture.