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May 30, 1974 (Des Moines: Polk: Training site for black officers in World War I. 8: George M. Verity: George M. Verity (towboat): December 20, 1989 (Keokuk: Lee: One of three surviving steam-powered towboats in the United States, this ship pioneered on upper Mississippi in a certain way, leading to large private industry.
Iowa: Private One of the few essentially natural glacial pothole lakes remaining in Iowa. Cayler Prairie: 1965: Dickinson: State An example of the increasingly rare virgin prairie grassland. Cold Water Cave: 1987
This site is located on the St. Croix River upstream of Stillwater, Minnesota. It was established by Stillwater lumber barons, including Isaac Staples, in 1856 after the demise of the original St. Croix Boom Company, which had operated a boom further upstream near Marine on St. Croix, Minnesota. Staples and others purchased the Boom Company and ...
Click on a state to see a list of the National Historic Landmarks in that state. The United States National Historic Landmark Program is designed to recognize and honor the nation's cultural and historical heritage.
Name Image Date Location County Ownership Description Ancient River Warren Channel: 1966: Big Stone: mixed- state, private A channel cut by the Ancient River Warren during the Ice Age.
The Jordan Aquifer is the largest source of groundwater, extending from northeast Iowa to south central Iowa, and is ultimately the source of much of Iowa's agricultural and industrial water. In addition to pollution threats, the aquifer is threatened by overuse in well-source irrigation, ethanol production, and the diminishment of resupply ...
Lidar-derived image of Marching Bears Mound Group, Effigy Mounds National Monument.. Prehistoric earthworks by mound builder cultures are common in the Midwest.However, mounds in the shape of mammals, birds, or reptiles, known as effigies, apparently were constructed primarily by peoples in what is now known as southern Wisconsin, northeast Iowa, and small parts of Minnesota and Illinois.
The Cedar River is a 338-mile-long (544 km) [2] river in Minnesota and Iowa.It is a tributary of the Iowa River, which flows to the Mississippi River.The Cedar River takes its name from the red cedar (Juniperus virginiana) trees growing there, and was originally called the Red Cedar River by the Meskwaki. [3]