Mt. Rich Petroglyphs - Credit: Wikimedia Commons
The Mt. Rich Petroglyphs are a series of pre-Columbian petroglyphs, set deep in a ravine along the Saint Patrick River in Mt. Rich, Grenada. The site consists of several boulders carved by ancient Amerindians, the largest of which contains over 60 engravings. Two "workstones" can also be found nearby, comprising six cupules. Read more on Wikipedia
Source: en.wikipedia.org