The Independent reported that Egyptian archaeologists have accidentally discovered what they described as a large abnormal object buried near the Giza pyramid complex in Egypt.
Researchers have used new tools such as cross-terrest radar to check the western cemetery in Giza to see if there is anything buried below that has not been discovered.
They discovered a pair of underground structures - one shallow, one deep - under a royal cemetery near the 4,500-year-old Great Pyramid of Giza.
Archaeologists described the structures as unusual because their density was different from the density of the surrounding ground.
They believe the structures were man-made and suspect they were replenished after construction.
Archaeologists wrote: The Western Cemetery in Giza is known as a place of important burial for royal members and high-ranking officials. An initial survey using cross-terrain radar has revealed abnormalities in the north of the survey site.
The area of the abnormal zone can be determined preliminarily, but the structure and location are still unclear.
The shallow structure is 10 meters wide, 15 meters long and 2 meters deep.
Researchers suspect that this structure was used to support the construction of larger, deeper structures, about 5 meters at the shallowest point and 10 meters at the deepest point.
Researchers say such abnormalities may be due to a mixture of sand and gravel or due to the sparse distance between air gaps.
It could be a deeper structural access, the researchers said.
From the survey results, we cannot determine the material cause of the abnormality, but it could be a large underground archaeological structure, the researchers noted.
Researchers hope that careful excavation of archaeological sites can help determine the nature of these structures.
