Bathing at 'Boiling river' with a rainbow in the background. One of the hot springs comes together with the river. So you can try to find that perfect spot in the river where the cold and hot water are mixed to your prefers. Getting up to this spot is a whole adventure. Your one leg is boiling while the other one is freezing.
These landscapes are like nothing you've ever seen! It feels so strange to walk around in this whole new world.