Why is the city of Mohenjo- Daro important?

It was discovered in 1921 and has become an important archaeological find because it once housed the Indus Valley civilization, one of the earliest settlements in the world's history. In 1980 Mohenjo-Daro became the first UNESCO world heritage site in South Asia. The civilization of the Indus River at Mohenjo-Daro and Harappa arose at about 2500 BCE and ended with apparent destruction about 1500 BCE. Apparently, the Indus civilization was likely destroyed by the Indo-European migrants from Iran, the Aryans. The cities of Mohenjo-Daro and Harappa were built of fire-baked bricks. The best find archeologist has found is the Great Bath. A 2.4-m-deep, 12-m-long, and 7-m-wide pool known as "The Great Bath" in the center of higher settlement is the best-known structure of Mohenjo-Daro.