The Cincinnati Zoo and Botanical Garden is the second oldest zoo in the US. It is home to over 500 animals and 3,000 plant species. The zoo is 18 miles from the airport and it will take approximately 23min to drive there. The other famous attraction to visit is the National Underground Railroad Freedom Center, which is a museum that is based on the Underground Railroad’s history. The center is 6.2 miles from the airport and it will take 12min to drive there.