Mysterious L-shaped structure found near Egyptian pyramids of Giza baffles scientists

A photograph of a group of archaeologists at a survey site in front of a pyramid.

Using remote sensing techniques, archaeologists in Egypt have discovered a mysterious L-shaped structure underground in the western cemetery of Giza. 

The western cemetery contains burials of royal family members of the royal family and high-ranking officials, the team of scientists wrote in a study. Many of their tombs have above-ground rectangular stone or mud-brick structures with flat roofs known as "mastabas."