âFirst Class Zooâ. 1  We visited with grandkids on a Friday in late August. 2  We spent over 4 hours there and didn't get to everything. 3  We visited with grandkids on a Friday in late August. 4  We spent over 4 hours there and didn't get to everything. 5  The Columbus Zoo and Aquarium is amazing. 6  We spent two(2) days in complete awe.