Egyptian antiquities officials announced Thursday that they had discovered a nine-meter-long hidden corridor behind the main entrance to the Great Pyramid of Giza, which they said could lead to further discoveries.
The discovery was made as part of the Scan Pyramids project, which has been using modern technology since 2015.

Project involving scanning and endoscopes to look inside the pyramid, the last of the seven wonders of the ancient world.
"The unfinished corridor was probably built to reduce the weight of the pyramid at the main entrance, seven meters below, or in another room or area yet to be discovered," said Mostafa Waziri, head of Egypt's Supreme Council of Antiquities.

The Great Pyramid was built as a monumental tomb around 2560 BC, during the reign of Pharaoh Khufu or Cheops.
It stands at a height of 146 meters, which is the tallest human-built structure until the Eiffel Tower in Paris in 1889.