Congost de Mont-Rebei or the Gorge of Mont-Rebei is a beautiful gorge created by the river Noguera Ribagorçana as it cuts through the ‘Sierra de Montsec’, a mountain range in the Catalan province of Spain, and forms a natural boundary between Aragon and Catalonia. It lies between the province of Lleida and Aragon, between the regions of La Noguera and Pallars Jussà, crossing the Serra del Montsec. Congost de Mont-Rebei is the only great gorge in Catalonia which has been kept more or less intact in virgin territory without being crossed by any road, railway or electricity line. It is only crossed by a narrow mule track that was etched into the sides of the canyon in the 1980s, that provides adventurous tourists and hikers spectacular views and glimpses of the green river further below on the canyon floor. The walls of the gorge reach vertical heights in excess of 500 metres at points and the gorge is no more than 20 meters across.

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