At the foot of Aneto, the highest mountain in the Pyrenees.
Le Trou du Toro (or Forau de Aygualuts) is one of the most extraordinary places in the Pyrenees. A gulf, around 40 metres deep, into which the waters from the glaciers of the Aneto, a Pyrenean peak, throw themselves. An astonishing natural phenomenon, where the mountain literally swallows the river. The waters penetrate the ground and disappear. They then follow an underwater course of more than 3km, before reappearing in the Val d’Aran region, still in Spain.
The spectacle is fascinating, and you start to dream of being a little molecule of water, diving into Le Trou du Toro, flowing along the course through the rocks, and coming out a few kilometres further on and becoming the Garonne.
You can discover le Trou du Toro in the following itineraries: