The route is incredibly diversified, constantly leading uphill and downhill, passing through beautiful rainforest. The highlight is the trail section in the Valley of Desolation. Boiling water, hot steam and sulfur is coming to surface in innumerable places. The soil changes daily, that's why there is no prepared trail through this valley, you have to find the best way through this vulcanic area.
Therefore, it is highly recommended to take a guide who knows the current conditions. It can easily happen that you step on the wrong place and break through the surface into small pots of boiling water. At one place I even burned my heel a bit because I was not looking carefully enough