Installations by renowned international artists including Italy's Michelangelo Pistoletto and Portugal's Alexandre Farto have been erected in the sand under the great pyramids of Giza outside Cairo.

The fifth edition of the contemporary art exhibition "Forever is Now" is due to run to December 6.

The 92-year-old Pistoletto's most famous work, Il Terzo Paradiso, comprises a three-metre-tall mirrored obelisk and a series of blocks........

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