Near Alto, Texas, the Caddoan Mounds were a major ceremonial center for the Caddo Nation from 800 to 1300 AD. These are man-made earthen mounds, which are classic "ley line markers" similar to the Silbury Hill in England.
This article will serve as your comprehensive guide. We will explore the history of ley lines, the specific geology of Texas that makes it a hotspot, and exactly what you can expect to find when you overlay a grid of "sacred geometry" onto the map of Texas.