Olcmulgee National Monument

These preserved mounds were built by the Mississipian culture of native Americans somewhere around 1000 years ago. However, it wasn't deemed a National Monument until the 1930s when construction workers stumbled upon archaeological evidence of 8 separate mounds while digging. Today the most prominent sites there are the great temple mound which was likely used for religious ceremonies and the earth lodge, a gathering place for what were probably the tribe's leaders that is literally carved out of the earth. There are also multiple burial mounds.