These motto stones are known as the Babson Boulders, named after millionaire philanthropist Roger Babson, who commissioned out of work stonecutters to carve words into the boulders around Dogtown Common, Massachusetts.
The Babson Boulders date back to the 1930s, and many of the slogans have that Depression Era air of inspired determination, like a stony band of self-help gurus.
Link --via Creative Review
This one above, the "Use Your Head" rock is my favorite! :)
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