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Mystery corridor is found in Egypt's Great Pyramid

Hidden structure found inside the Great Pyramid of Giza

The new secret room (highlighted in red) found inside Egypt's Great Pyramid (top left) has been hailed as the biggest discovery inside the Giza landmark since the 19th century. An apparent void lying undiscovered deep within the ancient Wonder of the World was found by scientists who had been mapping it using cosmic-ray based imaging (scan pictured top centre). The internal structure is located above the Grand Gallery - that links two of the pyramid's chambers - and traces a similar route for at least 30 metres (100ft), according to a study published in the journal Nature. The precise design and purpose of the space remains unknown, and scientists are now hoping a flying robot could be sent in to uncover its secrets.