This charming state is where you can take a photo in front of the original American Gothic house, bike the 25 mile High Trestle Trail and hike the breathtaking bluffs that overlook the Mississippi River. The Effigy Mounds National Monument in northern Iowa showcases the historic mounds built by the native people from over 20 different Native American tribes. Between the caves, lakes and rolling hills, Iowa has a ton to offer visitors looking to get outside and explore.