The Orwell site, designated 21OT7 in the state archaeological inventory, is a historic site located near
Fergus Falls, Minnesota, United States. It consists of twelve Middle or Late
Woodland period burial mounds, four of which are enclosed by an
earthwork. They were built from about A.D. 350–600. They share similarities with the mounds found at
Fort Juelson, also in
Otter Tail County, with their central burial chamber.[3] The site was listed on the
National Register of Historic Places in 1974.[1]