Rock City, Kansas, National Natural Landmark in Minneapolis, Kansas.
Rock City Park is a natural landmark in Ottawa County containing over 200 sandstone spheres scattered across roughly five acres. These rounded rocks range widely in size, with the largest ones reaching about 27 feet (8 meters) across.
The formations developed over millions of years through natural geological processes but were initially misidentified as glacial deposits or marine fossils. Scientific study in the 1930s revealed their true nature as naturally cemented sandstone concretions.
Families have been drawn to these rock formations for generations, making it a place where people gather to experience something unusual in the landscape. The site represents how communities value and protect natural oddities that define their region.
The park is open during regular hours and visitors can walk freely through the grounds to view the rocks up close. Restroom facilities and parking areas are available on the site.
The spheres are held together by natural calcite cement that formed the same way the surrounding rocks did, yet somehow created these nearly perfect round shapes. This geological phenomenon is rare enough that scientists continue to study how nature achieves such uniform formations.
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