艾奥瓦州
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1718年繪製的愛荷華州地圖
愛荷華州水系圖
愛荷華州降水量
愛荷華州
達文波特的天際線
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位於貝爾普萊恩（Belle Plaine）、美国30號州际公路旁的普萊斯頓服務站（Preston's Service Station）設立於1923年，目前已經改裝成林肯公路（Lincoln Highway）的紀念博物館