▁tren ches . ▁All ▁this ▁was ▁conducted ▁by ▁rot ational ▁labor ▁under ▁the ▁close ▁super vision ▁of ▁Imperial ▁architect s . ▁ ▁Jean - Pierre ▁Pro t zen , ▁a ▁professor ▁of ▁architecture , ▁has ▁shown ▁how ▁the ▁In ca ▁built ▁long ▁and ▁complex ▁ram ps ▁within ▁the ▁stone ▁quar ries ▁near ▁O ll ant ay t am bo , ▁and ▁how ▁additional ▁ram ps ▁were ▁built ▁to ▁drag ▁the ▁blocks ▁to ▁the ▁construction ▁above ▁the ▁village . ▁ ▁He ▁suggests ▁that ▁similar ▁ram ps ▁would ▁have ▁been ▁built ▁at ▁Sac say hu aman . ▁ ▁Modern - day ▁use ▁Peru vi ans ▁celebr ate ▁In ti ▁Ray mi , ▁the ▁annual ▁In ca ▁festival ▁of ▁the ▁winter ▁sol st ice ▁and ▁new ▁year . ▁It ▁is ▁held ▁near ▁Sac say hu am án ▁on ▁ 2 4 ▁June . ▁Another ▁important ▁festival ▁is ▁War ach ik uy , ▁held ▁ann ually ▁on ▁the ▁third ▁Sunday ▁of ▁September . ▁ ▁Some ▁people ▁from ▁C us co ▁use ▁the ▁large ▁field ▁within ▁the ▁walls ▁of ▁the ▁complex ▁for ▁jog ging , ▁t ' ai ▁chi , ▁and ▁other ▁athlet ic ▁activities . ▁ ▁See ▁also ▁List ▁of ▁buildings ▁and ▁structures ▁in ▁C us co ▁List ▁of ▁meg al ith ic ▁sites ▁ ▁Hu aca ▁de ▁Ch ena ▁ ▁References ▁ ▁External ▁links ▁ ▁BBC ▁Article ▁New ▁Disc over ies ▁at ▁Sac say hu am án ▁ ▁Category : L ost ▁ancient ▁cities ▁and ▁towns ▁Category : Build ings ▁and ▁structures ▁in ▁C us co