Outside of Manaus, the slow-moving, muddy Amazon and the darker, quicker Río Negro flow side by side for 6 km (4 miles) without mixing. If you run your foot in the water at the meeting place, you can feel the difference in temperature—the Amazon is warm and the Negro is cold, the consistencies of the rivers are different, and the experience is magical. At the CEASA port you can rent a boat, or go with a tour company. It takes about an hour to go from CEASA to the Meeting of the Waters, spend some time there, and return. A taxi to CEASA from downtown is about R$30.