. 9 ▁metres ) ▁high , ▁covered ▁by ▁a ▁huge ▁m ound ▁of ▁stones ▁and ▁tur ves . ▁ ▁The ▁c air n ▁was ▁aligned ▁almost ▁exactly ▁North - S outh , ▁with ▁the ▁bur ial ▁chamber ▁under ▁the ▁wider ▁northern ▁end . ▁ ▁At ▁the ▁northern ▁edge ▁of ▁the ▁c air n , ▁a ▁double ▁wall ▁could ▁be ▁made ▁out , ▁cur ving ▁in wards ▁to ▁form ▁an ▁entrance ▁to ▁a ▁forec ourt . ▁ ▁Today ▁the ▁c air n ▁has ▁been ▁badly ▁ro bb ed ▁and ▁the ▁main ▁features ▁are ▁the ▁five ▁large ▁g rit stone ▁sl abs , ▁the ▁remains ▁of ▁the ▁bur ial ▁chamber . ▁ ▁Sur pr ising ly , ▁evidence ▁suggests ▁that ▁the ▁bodies ▁were ▁not ▁inter red ▁directly ▁in ▁the ▁tomb , ▁but ▁were ▁left ▁outside , ▁perhaps ▁at ▁the ▁entrance ▁to ▁the ▁c air n , ▁for ▁birds ▁and ▁wild ▁animals ▁to ▁consume ▁the ▁flesh ▁and ▁then , ▁probably ▁after ▁elaborate ▁cer emon ies , ▁the ▁b ones ▁were ▁placed ▁inside ▁the ▁chamber . ▁ ▁P ik est ones ▁is ▁the ▁earliest ▁man - made ▁structure ▁in ▁the ▁area ▁and ▁only ▁one ▁other ▁chamber ed ▁tomb ▁has ▁been ▁found ▁in ▁Lanc ash ire . ▁ ▁The ▁monument ▁must ▁have ▁taken ▁an ▁immense ▁amount ▁of ▁labour ▁to ▁construct ▁and ▁like ▁most ▁long ▁bar rows ▁was ▁ere cted ▁in ▁a ▁prominent ▁position , ▁located ▁on ▁a ▁r idge ▁at ▁a ▁height ▁of ▁just ▁over ▁ 9 0 0 ▁feet ▁( 2 7 6 ▁metres ). ▁ ▁This