I have not yet been there, but I'm adding it to the list of places in Michigan's Upper Peninsula that I need to visit.  Onlyinyourstate.com has more gorgeous pictures here of our state's largest natural freshwater spring. Kitch-iti-kipi, 'The Big Spring', which was called "Mirror of Heaven" by the land's native people.

The stunning attraction is at the Palms Book State Park, near Manistique.

I swear, one day the epic roadtrip to the UP for kayaking at Pictured Rocks and visiting the waterfalls will happen one summer, though likely not this one.