Osum Canyon, Natural canyon in Skrapar District, Albania.

Osum Canyon is a river gorge in the Skrapar District near Çorovodë, cut by the Osum through the limestone of the Çorovodë anticline. Its vertical walls rise 70 to 80 metres above the river, and its width runs from 4 to 35 metres, with six narrow sections as little as 1.5 metres across at the riverbed. Erosion has pitted the slopes with small caves, and rock formations carry names such as the Cathedral, the Eye and the Demon's Door.

This gorge formed approximately 2 to 3 million years ago when water gradually wore away the limestone layers at an elevation of around 450 meters. The relentless work of the river over millions of years carved out the walls and passages visible today.

Local legends name two features of the gorge. Vrima e Nuses, a karst gallery 7–8 m long and about 2 m wide near Bigaz village, is linked to a bride forced into marriage who asked the rock to open and hid inside; newly married women later visited it hoping to conceive. Near Dhores, about 5 km from Çorovodë, karst shapes resembling a horse's hoof and a staff are called the traces of Saint Abaz Ali, venerated by Bektashi believers.

Spring provides the best conditions for water activities like rafting and exploring waterfalls, while summer welcomes visitors who want to swim in natural pools scattered through the landscape. Sturdy footwear is essential, and water levels change with the season, so check conditions before planning any activities.

The "Vrima e Nuses" (Bride's Hole) is a karst gallery about 7–8 m long and 2 m wide, 800 m from Bigaz village. Legend says a bride forced into marriage asked the rock to open and hid inside; afterwards, newly married women visited it hoping to conceive. Near Dhores, 5 km from Çorovodë, karst forms resembling a horse's hoof and a staff are called the traces of Saint Abaz Ali.