Our guide was Miranda, whose historical knowledge, dramatic flair, sense of humor (corny and otherwise), and Australian accent kept us all engaged throughout the entire tour.
This tour is about half above-ground and half underground. There is a fair amount of walking and stairs involved, but nothing too much for most people. We were in Cincinnati for the Blink festival, so there was a large group of us to wrangle (including a small child). Miranda handled everything seamlessly.