The Forau d'Aigualluts is a

karst Karst () is a topography formed from the dissolution of soluble carbonate rocks such as limestone and Dolomite (rock), dolomite. It is characterized by features like poljes above and drainage systems with sinkholes and caves underground. Ther ...

formation and waterfall in the

Province of Huesca Huesca (; ), officially Huesca/Uesca, is a province of northeastern Spain, in northern Aragon. The capital is Huesca. Positioned just south of the central Pyrenees, Huesca borders France and the French departments of Haute-Garonne, Pyrénées- ...

, northeastern Spain. It lies along the

Ésera River The Ésera () is a tributary of the Cinca in the High Aragon. It is part of the valley of the Ebro and its drainage basin. Its etymology is Celtic and it is cognate with several European rivers: Isar, Jizera, Isère, Isel, IJssel, and Eisack T ...

, at 2074 m above sea level on Pico Aneto.

Description

The Forau de Aiguallut is a chasm through which the waters from the Aneto glacier disappear to resurface again in the

Val d'Aran Aran (; ; ) (often known as the Aran Valley, or Val d'Aran in Aranese Occitan; in other forms of Occitan: ''Vath d'Aran'' or ''Vau d'Aran'', in Catalan: ''Vall d'Aran'', in Spanish: ''Valle de Arán'') is an autonomous administrative entity (form ...

, in the

Garonne The Garonne ( , ; Catalan language, Catalan, Basque language, Basque and , ; or ) is a river that flows in southwest France and northern Spain. It flows from the central Spanish Pyrenees to the Gironde estuary at the French port of Bordeaux � ...

river basin, which flows into the Atlantic Sea in the French city of

Bordeaux Bordeaux ( ; ; Gascon language, Gascon ; ) is a city on the river Garonne in the Gironde Departments of France, department, southwestern France. A port city, it is the capital of the Nouvelle-Aquitaine region, as well as the Prefectures in F ...

. Before its disappearance, the waters coming from the

Aneto glacier The Aneto glacier ( Aragonese: Glaciar d'Aneto, Spanish : ''Glaciar del Aneto'') is a glacier located on the northwestern flank of Aneto in the Pyrenees. It is the greatest glacier in the Pyrenees and the Iberian Peninsula The Iberian Penin ...

flow into the great meadow of the Plan d’Aigualluts, where it meanders in small meanders until it falls through the colorful Aiguallut waterfall which flows directly into the great chasm of Aiguallut.

References

Landforms of the Province of Huesca Waterfalls of Spain Landforms of Aragon {{huesca-geo-stub