1. Grand Prismatic Spring
| Grand Prismatic Spring is the largest hot spring in the United States, and the third largest in the world, located in the Midway Geyser Basine. Bright colors in the spring is the result of pigmented bacteria in microbial mats that grow around the edges of mineral water. The bacteria produce colors ranging from green to red, the number of colors in the microbial mats depends on the ratio of chlorophyll to carotenoids. In summer, the mats tend to be orange and red, while in winter the mats are usually dark green. Central pool to be sterile due to extreme heat. |
| 2. Mammoth Hot Springs |
| Travertine Mammoth is a large hill that has been made for thousands of years as hot water from the spring cooled and deposited into calcium carbonate. Mammoth Hot Springs Terrace Mountain is the largest and most famous in the world. The terraces have been deposited by the spring for years, but due to the small earthquake activity, opening spring has shifted, so the porch to dry. |
| 3. Blood Pond Hot Spring |
| Blood Pond Hot Spring is one of the “hells” (jigoku) of Beppu, Japan. Nine spectacular natural hot springs are more for viewing rather than for a bath. Displays features of “blood pond hell”, such as iron rusty red water. |
| 4. Blue Lagoon |
| Spa Blue Lagoon is one of the hot water bath the most visited in the warm waters of Iceland. Blue Lagoon rich in minerals like silica and sulfur are believed to help some people suffering from skin diseases like psoriasis |
| 5. Glenwood Springs |
| Glenwood Springs, Colorado is the largest hot water bath with the concept of a crowded pool. |
| 6. Jigokudani Monkey Park |
| Jigokudani Monkey Park in Yamanouchi, Shimotakai District, Nagano Prefecture. This is part of Joshinetsu Kogen National Park. Jigokudani name, which means “Valley of Hell” is a steam and boiling water that comes out from the crevices of small bubbles in the frozen ground, surrounded by steep cliffs and formidably cold forests. In this place a lot of wild Japanese macaques (Macaca fuscata), more commonly referred to as the Snow Monkey. The monkeys are going to the valley during the winter. Starting in 1963, the monkeys come down from the steep cliffs and enjoy the warmth of a hot water bath, and back into the woods at night. |
| 7. Deildartunguhver |
Deildartunguhver is hot water in Reykholtsdalur, Iceland. It is characterized by very high flow rate of hot springs (180 liters / sec) and water temperatures are at 97 degrees centigrade. This is the highest heat flow in the spring in Europe.
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