 <unk> <unk> Monument Q ( also known as the <unk> Head and <unk> <unk> <unk> Head 2 ) measures 1 @.@ 45 metres ( 4 @.@ 8 ft ) high by 1 @.@ 34 metres ( 4 @.@ 4 ft ) wide by 1 @.@ 26 metres ( 4 @.@ 1 ft ) deep and weighs 8 @.@ 5 tons . Its exact date of discovery is unknown but is estimated to have been some time in the 1940s , when it was struck by machinery being used to clear vegetation from <unk> hill . Monument Q was the eleventh colossal head to be discovered . It was moved to the plaza of Santiago <unk> in 1951 and remains there to this day . Monument Q was first described by Williams and <unk> in an article published in 1965 . The headdress is decorated with a frontal tongue @-@ shaped ornament , and the back of the head is sculpted with seven <unk> of hair bound with <unk> . A strap descends from each side of the headdress , passing over the ears and to the base of the monument . The face has pronounced <unk> around the nose , mouth and eyes . 
