The structure marks a turning point in the construction of pyramids in ancient Egypt, experts say.
Egypt opened to the public this Saturday the "curved" or "crooked pyramid", a 101-meter structure built for the Seneferu pharaoh, south of Cairo, which marks a turning point in the evolution of pyramid construction.
Tourists will be able to descend a 79-meter tunnel from an entrance on the north side of the pyramid and visit two chambers within the 4600-year structure. They will also be able to enter a small pyramid next door, possibly built for the Pharaoh's wife, Heteferés, opened for the first time since it was discovered in 1956.
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