You like trout Then you need to head down to Siewers Spring State Park just outside Decorah, where over eighteen million gallons of ice-cold water pour out of the ground every single day. It feeds the state fish hatchery. Honestly, watching hundreds of rainbow trout swarm the water when you toss a handful of fish food into the raceways is worth the trip all by itself. Kids love it. Plus, parking and walking around won't cost you a dime.

If fishing isn't really your thing, you can hop right onto the paved Trout Run Trail with a bike or just grab a picnic table near the water. Keep your eyes up, too. The famous Decorah bald eagles built a massive nest right in a cottonwood tree near the park, so you'll usually catch them hunting along the creek. Bring a light jacket even in July. That spring water keeps the air surprisingly chilly down by the banks.