We booked this tour online about $40 per person for 4 pm. We were requested to meet 30 min before at a hotel. We were waiting on the wrong side and walked over. There were some guides around. We checked in with one of them. The first guide felt like a school teacher and so when we were asked to swap out to another guide we took the opportunity. We went with Kai, she was informative and funny. We walked around, took opportunities for photo shots. We learnt about Al Capone, ghosts in the river, serial killer and infamous hotels around the area. We stopped at Palmer hotel to enjoy the decor. It was interesting. Definitely carry water, wear good shoes, sunglasses.