Fontaine de Vaucluse (spring)
The Fontaine de Vaucluse (French pronunciation: [fɔ̃tɛn də voklyz]) is a karst spring in the commune of Fontaine-de-Vaucluse, France. It is the largest karst spring in metropolitan France by flow and fifth largest in the world, with annual output of 630,000,000 to 700,000,000 cubic metres (2.2×1010 to 2.5×1010 cu ft) of water. The spring is the prime example in hydrogeology of a "Vaucluse spring". It is the source of the Sorgue.
The spring in May 2008, at high water level
The Fontaine de Vaucluse, in April 2008
Same place, on 31 May 2008, during an overflow of 1.53 metres (5 ft)
Fontaine de Vaucluse, by Paul Huet, c. 1839
A karst spring or karstic spring is a spring that is part of a karst hydrological system.
A 130-metre (430 ft) deep karst spring of the Cetina River in Croatia
The Vrelo Bune (English: Wellspring of the Buna) with the Blagaj Tekke under a limestone cliff in Bosnia
Blautopf (Blue Pot), karst spring of the River Blau (River Blue) in Blaubeuren, Swabian Jura
Fontaine-de-Vaucluse, karst spring of the Sorgue, characterised by an upward movement of water from the depth of over 315 metres (1,033 ft)