
Mohenjo-daro
Built around 2500 BCE, the city had a street grid, covered drains, the Great Bath, and an estimated peak population over 40,000. Its Indus script survives in about 4,000 short inscriptions with no bilingual text to anchor a translation, and excavation stopped by the 1960s as groundwater salinity damaged the exposed brick.
Field Guide Entry
Built around 2500 BCE in the Indus Valley, Mohenjo-daro was one of the largest settlements of the Bronze Age Indus Valley Civilization, with an estimated peak population over 40,000 and remarkably advanced urban planning: a grid of streets, covered drainage running beneath entire neighborhoods, and a large public bathing structure known as the Great Bath. The city was lost beneath the earth for millennia until British and Indian archaeologists rediscovered it in 1919 to 1922.
Thousands of carved seals and small tablets found at the site bear a script, now called Indus script, that remains undeciphered; with no bilingual inscription to anchor a translation and only around 4,000 short, highly repetitive examples, researchers cannot even agree whether it represents a full written language or a more limited symbolic system. Some scholars argue for links to Dravidian languages, but this remains unproven.
Mortimer Wheeler, who led early excavations, initially proposed the city fell to a violent invasion, possibly by Indo-Aryan migrants. Most archaeologists now favor a more gradual decline: repeated river flooding, deforestation from the enormous fuel demand of brick-firing, and overworked agricultural land likely combined to make the area unsustainable over generations rather than ending the city in any single catastrophic event. Excavation itself was halted by the 1960s after rising groundwater salinity began damaging the exposed brick ruins, leaving large portions of the site still unexcavated today.
Visiting Information
The site and museum are open most days but closed Wednesdays. International visitors should check current visa requirements and travel advisories before planning a trip.
Field Gallery
No approved field photos yet. You could be first.
Community Notes
No community notes yet.
Explore More Mysteries
Arkaim
Found by accident in 1987 during a dam survey, this circular Bronze Age fortress in the Ural steppe was built with gates and doorways researchers say align to eighteen solar and lunar events, a claim, if accurate, of more precise astronomical design than Stonehenge.
Bada Valley Megaliths
Scattered across a remote Sulawesi highland valley, more than 400 carved stone figures, some over four meters tall, were made by a culture that left no name, no writing, and no agreed-upon date behind.
Actun Tunichil Muknal
Fourteen sets of human remains lie in the upper chamber where they were left more than a thousand years ago, some of them children. Pots sit among them with holes punched through the base so nobody could use them again. Cameras have been banned since 2012, when a visitor dropped one onto a skull.
Ale's Stones
Fifty-nine boulders stand in the outline of a ship on a ridge above the Baltic, the largest weighing about five metric tons, hauled up a slope to a spot with no shelter and no water. Radiocarbon evidence places the monument broadly in the later Iron Age, around 500 to 1000 CE. An amateur astronomer has spent decades arguing it is thousands of years older and is a solar calendar, and no working archaeologist accepts it.