San Lorenzo Colossal Head 6 ( also known as San Lorenzo Monument 17 ) is one of the smaller examples of colossal heads , standing 1 @.@ 67 metres ( 5 @.@ 5 ft ) . It measures 1 @.@ 41 metres ( 4 @.@ 6 ft ) wide by 1 @.@ 26 metres ( 4 @.@ 1 ft ) deep and is estimated to weigh between 8 and 10 tons . The head was discovered by a local farmworker and was excavated in 1965 by Luis Aveleyra and Román Piña Chan . The head had collapsed into a ravine under its own weight and was found face down on its left hand side . In 1970 it was transported to the Metropolitan Museum of Art in New York for the museum 's centenary exhibition . After its return to Mexico , it was placed in the Museo Nacional de Antropología in Mexico City . It is sculpted with a net @-@ like head covering joined together with sculpted beads . A covering descends from under the headdress to cover the back half of the neck . The headband is divided into four strips and begins above the right ear , extending around the entire head . A short strap descends from either side of the head to the ear . The ear ornaments are complex and are larger at the front of the ear than at the back . The face is that of an ageing male with the forehead creased in a frown , wrinkles under the eyes , sagging cheeks and deep creases on either side of the nose . The face is somewhat asymmetric , possibly due to errors in the execution of the monument .