South Africa archaeologists have rediscovered an ancient lost city from around 1800 AD known as Kweneng using laser technology.

The researchers – who are with the University of Witwatersrand – have been studying the site in the Suikerbosrand National Park for decades.

But it was not until cutting-edge laser technology known as LiDAR (Light Detection and Ranging) became available in recent years that they were able to study the ruins in detail from above, and discovered that what they thought was only a scattering of ancient stone huts, turned out to be an urban agglomeration.