Double Ditch Indian Village

Double Ditch, also known as the Double Ditch State Historic Site, Burgois Site, 32BL8, Bourgois Site, and Double Ditch Earth Lodge Village Site, is an archaeological site located on the east bank of the Missouri River north of Bismarck, North Dakota, United States. It is named for the two visible trenches that once served as fortifications for the village, but archaeologists found a further two ditches outside these indicating that the population was originally larger.

The site was the location of a Mandan Native American earth lodge village from approximately 1450A.D. to 1785 A.D. It was abandoned after the 1775–1782 North American smallpox epidemic. The site includes remains of earth lodges, midden mounds, and fortification ditches. It is managed by the State Historical Society of North Dakota.

Source: Wikipedia