ABOUT THE PRESERVE
John Ackerman established
the Minnesota Cave Preserve in 1989 to preserve, study, protect and to
promote conscientious exploration and conservation of our unique underground
The Minnesota Cave Preserve owns six preserves in S.E. Minnesota and Northern Iowa, which provides access to 36 miles of cave passages. The properties encompass 41 caves, 605.8 surface acres and 1,274 acres of additional subterranean cave rights.
Located in Southeastern Minnesota, the Cave Farm consists of 585.8 scenic surface acres combined with 192 additional acres of subsurface cave rights. To date, 36 caves have been discovered on the property including the largest, Spring Valley Caverns.
Spring Valley Caverns is the largest privately owned cave in the state and is the most extensive cave system on the Cave Farm. At over 5.5 miles in length, Spring Valley Caverns is rapidly approaching the 100th longest cave in the United States.
After completely excavating all rocks and soil over the three sinkhole entrances to the cave, a sizeable building, mimicking natural limestone, was constructed. It serves as a gathering place for cavers, researchers and nature groups before embarking on their underground journeys.
A number of ground breaking studies have taken place in Spring Valley Caverns, the results of which have been published in notable resources such as the Smithsonian Magazine.
Located in Iowa, just across the Minnesota border, The Minnesota Cave Preserve owns 5 surface acres and 200 acres of subsurface rights to 17.5 mile long Cold Water Cave. One hundred eighty-eight feet below the secure man made entrance lies one of the most prominent and most highly decorated cave system in the Upper Midwest. This cave system, the 32nd longest in the United States, has been dedicated as a National Natural Landmark.
Located in Southeastern Minnesota, the Minnesota Cave Preserve owns several surface acres and 358 acres of subsurface rights to Goliath’s Cave. Numerous streams have converged to create a vibrant active cave network scattered with rare formations. The exploration and survey of this cave system is currently underway. It is estimated that this cave system will be 3.5-4 miles long after the cave is fully explored and surveyed. Buy the book OPENING GOLIATH Preview #1 Preview #2 Preview #3