Deildartunguhver
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| Deildartunguhver | |
|---|---|
 | |
 | |
| Location | Reykholtsdalur, Iceland |
| Coordinates | 64°40′32″N 21°30′45″W / 64.6754473°N 21.5126228°W |
| Spring source | superheated groundwater |
| Type | geothermal |
| Temperature | 97 °C |
Deildartunguhver (Icelandic pronunciation: [ˈteiltarˌtʰuŋkʏˌkʰvɛːr̥]) is a hot spring in Reykholtsdalur, Iceland. It is characterized by a very high flow rate for a hot spring (180 liters/second) and water emerges at 97 °C (207 °F). It is the highest-flow hot spring in Europe.[a]
Some of the water is used for heating; it is piped 34 kilometres (21 mi) away to Borgarnes and 64 kilometres (40 mi) away to Akranes.
A fern called Struthiopteris fallax,[1][2] grows in Deildartunguhver. This fern is the only endemic fern in Iceland, and it does not grow anywhere else in the world.