I truly enjoy watching documentaries. They are a source of happiness for me. I'm amazed at the number of people who enjoy them as well. I recently watched the Mighty Amazon River. I really loved this one. I have always been fascinated by the river. It is one of the longest rivers in the world. Water dominates the vast landscape invading the banks during the rainy season. It's simply amazing how water can change an entire ecosystem. I even learned more about the underground river beneath the Amazon River.