People started leaving their marks on ‘Inscription Rock’ during the pre-Columbian era. The rock, now at the El Morro National Monument near Grants (pop. 8,806), is made of soft sandstone. It reaches 200 feet above the valley floor and is marked with ancient petroglyphs, as well as the signatures and messages of Spanish explorers dating back as far as 1605.
Inscription Rock’ at El Morro National Monument
https://americanprofile.com/articles/inscription-rock-at-el-morro-national-monument/By American Profile on September 23, 2001
Found in: Trivia