[1] Landmark name Image Date designated[2] Location County Description 1 Frederick A. and Sophia Bagg Bonanza Farm Frederick A. and Sophia Bagg Bonanza Farm April 5, 2005 (#85002832 ) Mooreton 46°15′11″N 96°51′57″W / 46.253056°N 96.865833°W / 46.253056; -96.865833 (Frederick A. and Sophia Bagg Bonanza Farm ) Richland Preserved bonanza farm . 2 Biesterfeldt Site Upload image December 23, 2016 (#100000874 ) Lisbon vicinity 46°23′46″N 97°29′11″W / 46.396111°N 97.486389°W / 46.396111; -97.486389 (Biesterfeldt Site ) Ransom 3 Big Hidatsa Village Site Big Hidatsa Village Site July 19, 1964 (#66000600 ) Stanton 47°21′41″N 101°23′22″W / 47.361255°N 101.389541°W / 47.361255; -101.389541 (Big Hidatsa Village Site ) Mercer Largest of three villages preserved in Knife River Indian Villages National Historic Site . 4 Fort Union Trading Post Fort Union Trading Post July 4, 1961 (#66000103 ) Williston vicinity 47°59′58″N 104°02′26″W / 47.999444°N 104.040556°W / 47.999444; -104.040556 (Fort Union Trading Post ) McKenzie and Williams Most important fur trading post on the upper Missouri until 1867. Visitors included John James Audubon , George Catlin , Father Pierre-Jean De Smet , Sitting Bull , Karl Bodmer , and Jim Bridger . 5 Huff Archeological Site Huff Archeological Site February 18, 1997 (#80002920 ) Huff 46°37′07″N 100°38′33″W / 46.618611°N 100.6425°W / 46.618611; -100.6425 (Huff Archeological Site ) Morton Former fortified village of the Mandan , on the bank of Lake Oahe . Archaeological site , now a state park open to the public. 6 Lynch Knife River Flint Quarry Lynch Knife River Flint Quarry July 13, 2011 (#11000629 ) near Dunn Center 47°21′12″N 102°37′22″W / 47.353333°N 102.622778°W / 47.353333; -102.622778 (Lynch Knife River Flint Quarry ) Dunn 7 Menoken Indian Village Site Menoken Indian Village Site July 19, 1964 (#66000599 ) Bismarck 46°50′29″N 100°31′06″W / 46.841495°N 100.518386°W / 46.841495; -100.518386 (Menoken Indian Village Site ) Burleigh Site of 13th-century village, now a state park.