Proclaimed to be the oldest arboretum west of the Mississippi the Riggs Arboretum was started in 1901 by John Walter Riggs. The arboretum covers 10 acres in Waterloo KS just 10 miles east of Kingman. John originally planted a collection of trees including cedars of Lebanon, Olive of Palestine, sequoia, magnolia, plants from Australia, and the lotus from the Nile. He succeeded in making numerous rare plants grow.

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