Monrebey Gorge challenges:

The Monrebey Gorge (in Catalan Congost de Mont-Rebei) is a place that is located between the provinces of Huesca and Lleida (Spain), between the regions of Ribagorza and Pallars Jussá.

It is constituted in the narrowest part through which the Noguera Ribagorzana river, which constitutes the natural border between Aragon and Catalonia, crosses the Sierra del Montsec.

Vertically falling walls of more than 500 meters and a width at its minimum point of 20 meters .

The Catalan part is part of the La Noguera Nature Reserve. It is within the Area of Natural Interest of the Sierra del Montsec.

It was acquired in 1999 by the Fundació Territori i Paisatge (currently known as the Fundació Catalunya-La Pedrera) with the aim of preserving its natural and landscape values.