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

1. MYSTERIOUS PETROGLYPHS

There are ancient petroglyphs on a wide range of boulders near the dry Winnemucca Lake in Nevada. The analysis suggests they’re the oldest petroglyphs found in America. The designs are different, some are circular shapes, and others are diamond-like. Archaeologists call the site unique because it has more petroglyphs than anywhere else in the U.S., so far. The glyphs are also about 10,000 years old and the origins and meaning of the designs are still unknown and may remain a mystery.