You will then participate in a 4-hour hike which is a little difficult for some, but the end result is definitely worth it. After your walk you will arrive at the Río Celeste (Río Azul). The blue color you will see is the result of a chemical reaction between two rivers that merge and contain different volcanic minerals. It is a very rare phenomenon that creates a fairy-tale beauty. You will see a waterfall, an ideal viewpoint for taking photographs and you will also be able to see the place where the river changes color. Then a typical Costa Rican lunch for 1 hour.