Site preserves a large prehistoric Hidatsa earthlodge village dating to the 1700s, protected by a fortification ditch, reinfo...
Military post established in 1864 by Gen. Alfred Sully to supply his campaign and to provide protection for white settlers in...
The sprawling Great Plains Synfuels Plant began operating in 1984. Produces more than 54 billion standard cubic feet of natur...
This 26-room, two-story frame building was built in 1883 as the summer residence of the Marquis' family. The Chateau is now a...
Theodore Roosevelt's first ranch cabin built after arriving in Dakota Territory for a hunting trip....