Geode State Park, Iowa

Geode State Park is a state park in Henry County, Iowa bordering Des Moines County. It is managed by the Iowa Department of Natural Resources. While it is named for Iowa's state rock, the geode, few can be found in the park. A display of geodes, with their mysterious crystal formations in their hollow cavities, can be seen at the park office. It is illegal to remove geodes from state parks. (Ref: https://en.wikipedia.org/wiki/Geode_State_Park)

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