Humans did NOT build Great Tartaria

(Tartarian Atlas) Why humans couldn't have built these Tartarian cathedrals

• Greater Tartaria, Tartary?
• On January 6, 1858, The Raftsman Journal published an intriguing article called Antiquities in America, discussing many of the ruins and structures [found] around this continent that have not been discussed by official history... Source: onenewspage.com

Were the "Tartarians" giants compared to us?