We have been to Cartagena three times. On our first cruise there I did some research before hand and learned how to do the city without group tours. ( which I try to avoid) You do have to be careful on who you hire to take you around the city. As soon as you leave the cruise port there with be too many taxi drivers wanting your service. We did pass them up because they were just too pushy. We found a driver and explained what we wanted to see that day he gave us a price which we did not accept but told him how much we wanted to spend. Sorry but that tour was a few years ago and I can't remember how much we paid. He agreed. We went to La Poppa first which I would recommend because of the beauty of the Monastery and the beautiful view of Cartagena. Then he took us to the Fortress which we truly enjoyed but be prepared to do some walking. Our drive waited for us while we toured both places and then took us to the Walled City. We paid him there and told him we would take a taxi back to the ship. The Walled City is very interesting to take in. BE PREPARED TO GET BOTHERED BY ALL THE VENDORS!! TWICE I 'VE HAD THEM FOLLOW US AROUND THE WHOLE TIME WE WERE THERE.. JUST KEEP WALKING.. This past April they were really bad, Being we have been there 3 times I said never again. But please don't let this stop you from going there just learn to say no and keep walking!! Plus DO NOT take the first price they quote because they will always lower the cost of what you are interesting in!!