The only site with remains of a Russian fort in Hawaii, this historic site sits on the eastern bank of Waimea River. Construction that began in 1816 was completed a year later. The remains of this Russian-engineered and Hawaiian-built fort along with surrounding terrain comprise the 17 acre park. The structure came about after a defense agreement between the ruling chief of Kauai and the Russian-American Company. The site is a registered National Historic Landmark located on the eastern headlands overlooking the harbor. The fort originally had walls 20 feet high and for a while made a mark on the short Russian history on the island. Built in Hawaiian style with stacked lava rocks in the shape of a star it once bristled with cannons, but is now in ruins. You can take free, self-guided tours.