Baranof Castle State Historical Site

Castle Hill also known as the American Flag-Raising Site and now as the Baranof Castle State Historic Site, is a National Historic Landmark and state park in Sitka, Alaska. The hill, providing a commanding view over the city, is the historical site of Tlingit and Russian forts, and the location where Russian Alaska was formally handed over to the United States in 1867. It is also where the 49-star United States flag was first flown after Alaska became a state in 1959.

Source: Wikipedia