Stock Photo - 13 May 2020, Saxony-Anhalt, Seegebiet Mansfelder Land: A diving robot with a high-resolution 3D laser swims in the sweet lake. With this new technology, a more than 3000 year old Bronze Age grave site and the remains of a medieval settlement are being surveyed at the bottom of the lake. The technique is being used for the first time in Germany. With the new device not only individual buildings but complete structures can be recorded. The laser measures under water with millimetre precision and generates spatial images. In the last two years, archaeologists from the State Museum in Halle had explored the lake bed with an underwater drone and discovered the structures. The conventional method with divers fails due to the poor visibility conditions in the lake. Photo: Jan Woitas/dpa-Zentralbild/ZB. - Seegebiet Mansfelder Land/Saxony-Anhalt/Germany