OSU is one of the greatest campuses in the US. Stop by the Ohio Union, walk through the Oval, and of course stop by the Ohio State stadium. 'The Shoe' is home to the greatest college football team and definitely a site to see!
The Short North Arts District is a great neighborhood to check out. It has a wide variety of art, dining, bars & unique shops.
It is located along the Scioto River, connecting downtown Columbus to multiple parks, paths and biking areas. Another nice place to see the views of Columbus and spend time outdoors.