Along the Rotoura Walkway is the sights and smells of Te Kauanga. The area has a smell from sulphurous gases belched from the depths of the earth. The yellow and black colors in the rocks are sulphur crystals formed from rising hydrogen sulphide gas. The gas was very active and people were not allowed to walk off the trail. The Grey colored rock was formed from silica, deposited by alkaline spring water that flowed over this area when the lake level was high. Green and brown algae grow in some of the warm, shallow waters.
