30 Unusual Archaeological Finds In The US We Still Can’t Explain

22. ANIMAL-SHAPED MOUNDS

Archaeologists discovered a unique mound in Ohio and no one can explain the meaning behind its shape. The hill is in the form of a giant snake and dating reveals ancient builders built it between 2000 and 1000 AD. Archaeologists still haven’t been able to decipher the culture which produced it, the exact date of production, and its usage. Scholars theorize it was either used for religious ceremonies, particularly sacrificial offerings, or it depicts a calendar. The mound does reveal an astrological alignment.