He's visited each one and taken photos, so he should know.

The Polk County Historical Society Monday evening hosted a presentation at the Polk County Museum by photographer, historian and author Doug Ohman. Ohman's new book, "Prairie, Lake, Forest – State Parks of Minnesota" highlights his visits to all 66 of Minnesota's state parks and includes photos highlighting the best the parks have to offer.

See Wednesday's Times for a story on what Ohman has to say about Minnesota's many state parks. Watch a video from his Monday evening talk on Wednesday, too.