This tour takes place at the tenorio volcano national park after some hiking you will get to the rio celeste blue river the blue color you can see is the resqult of a chemical reaction between two merging rivers containing different volcanic minerals its a very rare phenomenon which creates a fairy tale like beauty the hike itself is medium tough and takes about 3 hours it will take you to a waterfall a lookout point and the place where the river changes colors with the help of the g