[]: 2
[Name]: Cayler Prairie
[Image]:
[Date]: 1965
[Location]: 43°23′50″N 95°14′38″W / 43.397222°N 95.243889°W / 43.397222; -95.243889 (Cayler Prairie State Preserve)
[County]: Dickinson
[Ownership]: State
[Description]: An example of the increasingly rare virgin prairie grassland.[]: 3
[Name]: Cold Water Cave
[Image]:
[Date]: 1987
[Location]: 43°26′28″N 91°57′37″W / 43.44111°N 91.96028°W / 43.44111; -91.96028 (Cold Water Spring State Preserve)
[County]: Winneshiek
[Ownership]: Private
[Description]: An exceptional example of an extensive cave system well decorated with speleothems.[]: 6
[Name]: Loess Hills
[Image]:
[Date]: 1986
[Location]: 41°48′05″N 95°59′42″W / 41.8013°N 95.995°W / 41.8013; -95.995 (Loess Hills)
[County]: Harrison, Monona
[Ownership]: State, private
[Description]: The best examples of loess topography in the Missouri River Bluffs region.[]: 1
[Name]: Anderson Goose Lake
[Image]:
[Date]: 1975
[Location]: 42°18′56″N 93°37′26″W / 42.315556°N 93.623889°W / 42.315556; -93.623889 (Anderson Goose Lake)
[County]: Iowa
[Ownership]: Private
[Description]: One of the few essentially natural glacial pothole lakes remaining in Iowa.[]: 4
[Name]: Dewey's Pasture and Smith's Slough
[Image]:
[Date]: 1975
[Location]:
[County]: Clay, Palo Alto
[Ownership]: State
[Description]: Pothole lakes created during the last glacial epoch.[]: 5
[Name]: Hayden Prairie State Preserve
[Image]:
[Date]: 1965
[Location]: 43°26′22″N 92°22′59″W / 43.4395°N 92.3831°W / 43.4395; -92.3831 (Hayden Prairie State Preserve)
[County]: Howard
[Ownership]: State
[Description]: A true prairie remnant.
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