Fly Geyser, United States

Fly Geyser, also known as Fly Ranch Geyser is a small geothermal geyser that is located approximately 20 miles (32 km) north of Gerlach, in Washoe County, Nevada. The Geyser is located in Hualapai Flat, about 1/3 of a mile from State Route 34. It is large enough to be seen from the road. Fly Geyser is located on the private Fly Ranch and is accessible only by a small private dirt road. The ranch is currently owned by Todd Jaksick. There is a high fence and a locked gate with several metal spokes on the top to keep trespassers out, but despite the booby traps, many people still prefer to jump the fence to get a better look. Several organizations have tried to purchase the land for conservation, and make it open to the public, but have been denied.

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Fly Geyser is a very little known tourist attraction, even to Nevada residents. It is located right near the edge of Fly Reservoir and is only about 5 feet (1.5 m) high, (12 feet (3.7 m) if you count the mound on which it sits). The Geyser is not an entirely natural phenomenon, and was accidentally created in 1916 during the drilling of a well. The well functioned normally for several decades, but then in the 1960s geothermally heated water found a weak spot in the wall and began escaping to the surface. Dissolved minerals started rising and piling up, creating the mount on which the geyser sits, which is still growing to date. Today, water is constantly squirting out reaching 5 feet (1.5 m) in the air. The geyser contains several terraces discharging water into 30 to 40 pools over an area of 30 hectares (74 acres). The geyser is made up of a series of different minerals, which gives it its magnificent coloration.

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There are two additional geysers in the area that were created in a similar way as Fly Geyser. The first geyser is approximately 3 feet high and is shaped like a miniature volcano. The second geyser is cone shaped and is of the same approximate size as Fly Geyser. Like Fly Geyser, these geysers are continually growing.

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Blood Pond Hot Spring, Japan

A hot spring is a spring that is produced by the emergence of geothermally heated groundwater from the Earth's crust. There are geothermal hot springs in many locations all over the crust of the earth.The water issuing from a hot spring is heated by geothermal heat, i.e., heat from the Earth's mantle. In general, the temperature of rocks within the earth increases with depth. The rate of temperature increase with depth is known as the geothermal gradient. If water percolates deeply enough into the crust, it will be heated as it comes into contact with hot rocks. The water from hot springs in non-volcanic areas is heated in this manner.

Blood Pond Hot Spring is one of the “hells” (jigoku) of Beppu, Japan — nine spectacular natural hot springs that are more for viewing rather than bathing. The “blood pond hell” features a pond of hot, red water, colored as such by iron in the waters. It’s allegedly the most photogenic of the nine hells.

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Pamukkale, Turkey

Pamukkale, meaning "cotton castle" in Turkish, is a natural site in Denizli Province in southwestern Turkey. The city contains hot springs and travertines, terraces of carbonate minerals left by the flowing water. It is located in Turkey's Inner Aegean region, in the River Menderes valley, which has a temperate climate for most of the year.

The ancient Greco-Roman and Byzantine city of Hierapolis was built on top of the white "castle" which is in total about 2,700 metres (8,860 ft) long, 600 m (1,970 ft) wide and 160 m (525 ft) high. It can be seen from the hills on the opposite side of the valley in the town of Denizli, 20 km away. Tourism is and has been a major industry. People have bathed in its pools for thousands of years. As recently as the mid-20th century, hotels were built over the ruins of Heropolis, causing considerable damage. An approach road was built from the valley over the terraces, and motor bikes were allowed to go up and down the slopes. When the area was declared a World Heritage Site, the hotels were demolished and the road removed and replaced with artificial pools. Wearing shoes in the water is prohibited to protect the deposits.

Pamukkale's terraces are made of travertine, a sedimentary rock deposited by water from the hot springs. In this area, there are 17 hot water springs in which the temperature ranges from 35 °C (95 °F) to 100 °C (212 °F). The water that emerges from the spring is transported 320 metres (1,050 ft) to the head of the travertine terraces and deposits calcium carbonate on a section 60 to 70 metres (200 to 230 ft) long covering an expanse of 240 metres (790 ft) to 300 metres (980 ft). When the water, supersaturated with calcium carbonate, reaches the surface, carbon dioxide degasses from it, and calcium carbonate is deposited. The depositing continues until the carbon dioxide in the water balances the carbon dioxide in the air. Calcium carbonate is deposited by the water as a soft jelly, but this eventually hardens into travertine.

This reaction is affected by the weather conditions, ambient temperature, and the flow duration. Precipitation continues until the carbon dioxide in the thermal water reaches equilibrium with the carbon dioxide in the atmosphere. Measurements made at the source of the springs find atmospheric levels of 725 mg/l carbon dioxide, by the time this water flows across the travertines, this figure falls to 145 mg/l. Likewise calcium carbonate falls from 1200 mg/l to 400 mg/l and calcium 576.8 mg/l to 376.6 mg/l. From these results it is calculated that 499.9 mg of CaCO3 is deposited on the travertine for every liter of water. This means that for a flow rate of 1 ı/s of water 43191 grams are deposited daily. The average density of a travertine is 1.48 g/cm3 implying a deposit of 29.2 dm3. Given that the average flow of the water is 465.2 l/s this implies that it can whiten 13,584 square metres (146,220 sq ft) a day, but in practice this area coverage is difficult to attain. These theoretical calculations indicate that up to 4.9 square kilometres (1.9 sq mi) it can be covered with a white deposit of 1 millimetre (0.039 in) thickness.

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Rotorua region, New Zealand

Rotorua (from Māori: Te Rotorua-nui-a-Kahumatamomoe, "The second great lake of Kahumatamomoe") is a city on the southern shores of the lake of the same name, in the Bay of Plenty region of the North Island of New Zealand. The city is the seat of the Rotorua District, a territorial authority encompassing the city and several other nearby towns. Rotorua city has an estimated permanent population of 56,200, with the Rotorua district having a total estimated population of 68,900. The city is in the heart of the North Island, just 60 kilometres (37 mi) south of Tauranga, 80 kilometres (50 mi) north of Taupo, 105 kilometres (65 mi) east of Hamilton, and 230 kilometres (140 mi) southeast of Auckland.

 The Rotorua region has 17 lakes. Fishing, waterskiing, swimming and other water activities are popular in summer. The lakes are also used for event venues; Rotorua hosted the 2007 World Waterski Championships and Lake Rotorua was the venue for the World Blind Sailing Championships in March 2009. Lake Rotorua is also used as a departure and landing point for float planes.

The name Rotorua comes from Māori, the full name being Te Rotorua-nui-a-Kahumatamomoe; roto means lake and rua two – Rotorua thus meaning 'Second lake'. Kahumatamomoe was the uncle of the Māori chief Ihenga, the ancestral explorer of the Te Arawa. It was the second major lake the chief discovered, and he dedicated it to his uncle. It is the largest of a multitude found to the northeast of the city, all connected with the Rotorua Caldera and nearby Mount Tarawera. The name can also mean the equally appropriate 'crater lake'.

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The area was initially settled by Māori of the Te Arawa iwi. The first European in the area was probably Phillip Tapsell who was trading from the Bay of Plenty coast at Maketu from 1828. He later married into Te Arawa and became highly regarded by them. Missionaries Henry Williams and Thomas Chapman visited in 1831 and Chapman and his wife established a mission at Te Koutu in 1835. This was abandoned within a year but Chapman returned in 1838 and established a second mission at Mokoia Island.

The lakeshore was a prominent site of skirmishes during the New Zealand Wars of the 1860s. A "special town district" was created in the 1883, in order to promote Rotorua's potential as a spa destination. The town was connected to Auckland with the opening of the Rotorua Branch railway and commencement of the Rotorua Express train in 1894, resulting in the rapid growth of the town and tourism from this time forward. Rotorua was established as a borough in 1922 and declared a city in 1962 before becoming a District in 1979.

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