During the Harappan civilization, notable cultural achievements included advanced urban planning, standardized weights and measures, and impressive architectural feats. Harappan cities, such as Mohenjo-Daro and Harappa, featured well-planned streets and sophisticated drainage systems, showcasing their engineering prowess. Artifacts like pottery, jewelry, and seals reveal a rich artistic tradition and trade network with neighboring cultures. Their writing system, although still undeciphered, indicates a complex society. The civilization also demonstrated agricultural advancements, including irrigation techniques, contributing to their economic success. Together, these achievements reflect a highly organized society flourishing for centuries in the Indus Valley.