National Geographic
This cache is NOT at the posted locations.
Archaeologists guided by laser images of a remote region of northern Guatemala have discovered 20-foot-high walls, watchtowers, and other evidence that ancient Maya societies waged large-scale warfare over many years. The finds have upended long-established impressions of a civilization that tamed the jungle and built thriving cities, then declined and disappeared beneath the dense tropical forest.
Among the most startling discoveries was a large fortress complex now called La Cuernavilla. Built on a steep ridge between the Maya cities of El Zotz and Tikal, the heavily fortified site included high walls, moats, watchtowers, and caches of round stones that likely served as ammunition for warriors’ slings. It is the largest defensive system ever discovered in the region, and possibly all of the ancient Americas.
The presence of the Cuernavilla citadel and other newly identified structures built expressly for warfare suggests that conflict was large-scale and systematic, and a part of life throughout much of the ancient civilization’s duration.
The team of archaeologists used Lidar, which stands for light detection and ranging. Scans in 2016 covered 800 square miles, but revealed 60,000 previously unknown structures.
To solve the puzzle:

----------
One of the oldest roads in the state, Fort Road was originally built by the federal government after Fort Ridgely was completed in 1853-54. Supplies were shipped from Fort Snelling to Traverse des Sioux, then transported by wagon to Fort Ridgely.
Nicollet County Road 5 runs more than 42 miles from its eastern terminus at its intersection with US Highway 169 in St Peter to the Renville County line. Old Fort Road presumably extended from Traverse des Sioux, although the portion running through the campus of Gustavus Adolphus College has been blocked off. Fort Road as an address runs from the western edge of St Peter to the end of CR-5.
In an ideal world, a paved trail would have been installed when the road was refurbished in the early 2010s. This planned geocache trail will have to suffice, but won’t alleviate my anxiety when biking here.