The Johan Heine Stone Calendar (Adam's Calendar) in South Africa is said to be at least 75,000 years old.
Research and discoveries over the past twenty years or so have revealed that these ancient stone structures are most likely more than 75,000 years old, with some researchers suggesting they could be as old as 200,000 years. Moreover, researchers have concluded that the ruins are not merely those of village-like settlements, but are the remains of astronomical observatories and ancient religious temples.
View attachment 34458
View attachment 34459