Graham Cave
Graham Cave is a Native American archaeological site near Mineola, Missouri in Montgomery County. The entrance of the sandstone cave forms a broad arch 120 feet (37 m) wide and 16 feet (5 m) high. Extending about 100 feet (30 m) into the hillside, the cave protects an historically important Pre-Columbian achaeological site from the ancient Dalton and Archaic period dating back to as early as 10,000 years ago. -from Wikipedia
geologicalruralscenic
