Wind Cave National Park is a United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 national park

National park

A national park is a reserve of natural, semi-natural, or developed land that a sovereign state declares or owns. Although individual nations designate their own national parks differently A national park is a reserve of natural, semi-natural, or developed land that a sovereign state declares or...

 10 miles (16 km) north of the town of Hot Springs

Hot Springs, South Dakota

Hot Springs is a city in Fall River County, South Dakota, United States. As of the 2010 census, the city population was 3,711. It is the county seat of Fall River County...

 in western South Dakota

South Dakota

South Dakota is a state located in the Midwestern region of the United States. It is named after the Lakota and Dakota Sioux American Indian tribes. Once a part of Dakota Territory, South Dakota became a state on November 2, 1889. The state has an area of and an estimated population of just over...

. Established in 1903 by President Theodore Roosevelt

Theodore Roosevelt

Theodore "Teddy" Roosevelt was the 26th President of the United States . He is noted for his exuberant personality, range of interests and achievements, and his leadership of the Progressive Movement, as well as his "cowboy" persona and robust masculinity...

, it was the seventh U.S. National Park and the first cave

Cave

A cave or cavern is a natural underground space large enough for a human to enter. The term applies to natural cavities some part of which is in total darkness. The word cave also includes smaller spaces like rock shelters, sea caves, and grottos.Speleology is the science of exploration and study...

 to be designated a national park anywhere in the world. The cave is notable for its displays of the calcite

Calcite

Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate . The other polymorphs are the minerals aragonite and vaterite. Aragonite will change to calcite at 380-470°C, and vaterite is even less stable.-Properties:...

 formation known as boxwork

Boxwork

Boxwork is an uncommon type of mineral structure, or speleogen , occasionally found in caves and erosive environments....

. Approximately 95 percent of the world's discovered boxwork formations are found in Wind Cave.