They found things culturally similar to stuff people would find in the Egyptian Pyramids in the Grand Canyon allegedly but then the smithsonian institute or instuition took the stuff for it never to be seen again if I remember the allegation correctly although the second part is so common an allegation I might have just assumed it and misremembered
Also there are lots of native American Indian burial mounds
MAGA is a place in the sonic cartoon as in Make America Great Again or a rank in the Church of Satan or Krav MAGA
MAGA is involved in a three part ritual initiation in the cartoon if I remember correctly