SPRING VALLEY — John Ackerman is a big-time landlord of subterranean real estate. Ackerman, 59, owns Spring Valley Caverns, the largest private cave in Minnesota but just the beginning of his ...
RACINE — John Ackerman has been called a tree hugger and a kook by two landowners and a devil worshipper by a local town board member. He has been accused of land snatching and gold prospecting.
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SPRING VALLEY, Minn. (AP) — John Ackerman is a big-time landlord of subterranean real estate. Ackerman, 59, owns Spring Valley Caverns, the largest private cave in Minnesota but just the beginning of ...
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