Hatun Machay (possibly from Quechua hatun big, mach'ay cave)[2][3] is a rock forest with archaeological remains in Peru.

It was declared a National Cultural Heritage by Resolución Directoral No.

Hatun Mach'ay is situated on the western side of the Cordillera Negra in the Ancash Region, Recuay Province, Pampas Chico District, at a height of about 4,200 metres (13,780 ft).

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