Deildartunguhver
Iceland
Deildartunguhver (Icelandic pronunciation: [teiltartuŋkkvr]) 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. 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, grows in Deildartunguhver. This fern is the only endemic fern in Iceland, and it does not grow anywhere else in the world.
Data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).