My visit to the Tigre Delta was a unique experience. Accompanied by my girlfriend and our private cab driver, who knew the area well, we arrived at our destination in only 35 minutes from our hotel. She gave us a personalized tour of the city before arranging for us to take a tour of the delta on a local boat (I don't remember the local name for these boats, but they operate like buses, stopping at predetermined docks along the delta).
This private boat excursion was the highlight, as we were not part of a large tour group, but joined the locals moving through the delta. We happened to meet school children returning home, and I captured lovely moments with my video camera, sharing the images with them. It was a fantastic opportunity to immerse ourselves in the local scene, an experience hard to repeat with a standard tour company.