Emerald Spring is located in the Norris Geyser basin in the Yellowstone National park. Emerald spring is said to be 27 feet in depth. The water temperature in the spring attains a boiling point of 78 degree centigrade. The spring gets its name emerald green color from the effect it forms when sunlight falls on the surface of the water. Giving it a blue formation and thereby deflecting the yellow sulphur. Emerald spring is basically considered a calm hot spring pool but occasionally it has small 3 foot water eruptions.
Deildartunguhver is the best hot spring in Iceland located in Reykholtsdalur. The Deildartunguhver is characterized by a very high flow rate of boiling water emerging at 97 degree centigrade. The Deildartunguhver is the hot spring flowing from the highest point in the whole of Europe. The water of this hot spring is also said to be having therapeutic solutions. Therefore, to bring in the thermal energy of the natural spring to utility the boiling water is being piped to far off places.