Metal spheres mined from South Africa about an inch or so in diameter, some etched with 3 parallel grooves around the equator. Incredibly they were dug from Precambrian rock of the Archeon period billion years old!
Living Stones Of Costesti Costesti, a small Romanian village, has some interesting and incredible stones known as trovants, these mysterious stones grow as if they are alive after coming into contact with water from a heavy rainfall
The Nazca lines in Peru were made many centuries before the rise of the Inca empire and they are one of the most important legacies of ancient pre-Inca Peruvian culture. Basically they are are geoglyphs and geometric line clearings in the Peruvian desert.