Kitch-iti-kipi, The Big Spring is 45 ft deep and 45 degrees year around. Over 10,000 gallons per minute flow from fissures in the limestone to create this natural wonder. It is Michigan’s largest freshwater spring, located in the Upper Peninsula of Michigan. The swirling of sand is caused from the water flowing from under ground. I hung my GoPro 30 ft down to get this. The fish swimming around are large brook trout. More