▁heads ▁have ▁been ▁un ear th ed ▁in ▁the ▁Ol m ec ▁area , ▁four ▁of ▁them ▁at ▁La ▁V enta , ▁officially ▁named ▁Mon uments ▁ 1 ▁through ▁ 4 . ▁ ▁Three ▁of ▁the ▁heads — Mon uments ▁ 2 , ▁ 3 , ▁& ▁ 4 — w ere ▁found ▁roughly ▁ 1 5 0 ▁meters ▁north ▁of ▁Complex ▁A , ▁which ▁is ▁itself ▁just ▁north ▁of ▁the ▁Great ▁Py ram id . ▁These ▁heads ▁were ▁in ▁a ▁slightly ▁irregular ▁row , ▁facing ▁north . ▁The ▁other ▁col oss al ▁head — Mon ument ▁ 1 ▁( sh own ▁at ▁left ) ▁– ▁is ▁a ▁few ▁dozen ▁meters ▁south ▁of ▁the ▁Great ▁Py ram id . ▁ ▁The ▁La ▁V enta ▁heads ▁are ▁thought ▁to ▁have ▁been ▁car ved ▁by ▁ 7 0 0 ▁B CE , ▁but ▁possibly ▁as ▁early ▁as ▁ 8 5 0 ▁B CE , ▁while ▁the ▁San ▁Lorenzo ▁heads ▁are ▁cred ited ▁to ▁an ▁earlier ▁period . ▁The ▁col oss al ▁heads ▁can ▁measure ▁up ▁to ▁ ▁in ▁height ▁and ▁we igh ▁several ▁tons . ▁The ▁she er ▁size ▁of ▁the ▁stones ▁causes ▁a ▁great ▁deal ▁of ▁spec ulation ▁on ▁how ▁the ▁Ol m ec ▁were ▁able ▁to ▁move ▁them . ▁The ▁major ▁bas alt ▁quar ry ▁for ▁the ▁col oss al ▁heads ▁at ▁La ▁V enta ▁was ▁found ▁at ▁Cer ro ▁C inte pec ▁in ▁the ▁Tu xt la ▁Mountains , ▁over ▁ 8 0   km ▁away . ▁ ▁Each ▁of ▁the ▁heads