Tenino Sandstone Quarry Historic Site features an old quarry converted into a swimming pool surrounded by quarry walls, where visitors can swim in summer and explore artifacts from the quarry's industrial past. The site showcases the geological and historical significance of Tenino Sandstone, which was quarried between 1889 and the 1930s and used in fire-resistant buildings throughout North America, including structures that survived the 1906 San Francisco earthquake.
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