First of all make sure to enter at the 9th street entrance and not on Michigan - we had to learn the hard way. Now, we booked a 3-hour bike tour around downtown Chicago. It was awesome. Weve had a great tour guide Veronica who was very knowledgeable, kind and pleasant. They allow you to change the route if you want to see something additionally or stop to take photos. Veronica guided us in a way to avoid hills as they are harder to climb and she made the whole experience enjoyable. On the tour you see the attractions that are typically listed as signature such as the Bean (Cloud Gate), Sears Tower, Buckingham Fountain etc. Also, youll see a beautiful view of the downtown from a different side of the lake Michigan. I enjoyed it a lot and I definitely recommend this agency.