Fort Cascades
United States
Fort Cascades was a United States Army fort constructed in 1855 to protect the portage road around the final section of the Cascades Rapids, known as the "lower cascades." It was built on the Washington side of the Columbia River, between the present site of North Bonneville and the Bonneville Dam in Skamania County.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).