Alpenglow Rockshelter - a prehistoric rockshelter discovered in Pennsylvania, USA and located just a few hundred meters from the Council Rocks archaeoastronomy (Stonehenge-type) site dating to at least 1825 BCE - 4000 years before present.
The rockshelter has been heavily researched from 2015 onward. Now officially named, numbered, and registered with the State Historic Preservation Office. The band members all autographed the site registration documents at a concert event held in Philadelphia USA in March 2018.
Learn more about this amazing site: https://pahistoricpreservation.com/rockshelter-awakens/