Rasmuseum Peterson collected rocks from around his Cascade Mountain surroundings These colorful rocks included Oregon agates, obsidian, petrified wood, malachite and jasper. He began building with them in 1935. At first, it was just a small rockery near his home. But he kept on building on his 4-acre site until his death in 1952. He mortared the rocks together into miniature buildings, monuments, lagoons and bridges.
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