An underground tomb might be hiding next to the Giza pyramids

It could be a hidden doorway, but experts aren't sure

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Archaeologists have discovered two strange structures lurking beneath the ground next to the world-famous pyramids of Giza in Egypt.

Using radar technologies, a team of Japanese and Egyptian scientists have mapped a mysterious 10m-long (33ft) L-shaped structure, approximately 2m (6.6ft) beneath the surface — as well as a larger, deeper structure sitting about 5—10m (16-33ft) underground.