Gorges du Fier, Canyon in Lovagny, France

Gorges du Fier is a slot canyon cut by the Fier torrent in limestone at Lovagny, about 11 km west of Annecy. A metal walkway over 250 metres long, built in 1869 by architect Marius Vallin, runs along the rock face 25 metres above the stream. Its flat deck has silver-grey railings with vertical bars and diagonal cross-braces, supported by curved orange brackets; the walkway curves slightly and continues upward to a higher section with a small gate.

The gorge was cut by the Fier torrent over about 20,000 years, after meltwater from the glacier that formed Lake Annecy carved into the rock. In 1869 the Annecy architect Marius Vallin built the walkway fixed to the cliff, opening the site to visitors, and it has been classified since 1943.

The name Roche aux Fées refers to a rock formation along the route, tied to Savoyard legends. Local tradition instead tells of the page of the Count of Montrottier: hidden in the arms of the Count of Pontverre, Diane was denounced by the young page, who clung to the fleeing rider's horse tail and fell where the gorge opened. Valley residents still say they hear his moans rising from the gorge.

The walkway runs over 250 metres along the rock wall, about 25 metres above the torrent, and climbs to a higher section with a small gate. Sturdy shoes help on the metal deck, which can be wet near the spray. Flood marks carved in the rock, including one at 24 metres from January 2018, show how high the water can rise.

Below the walkway, the riverbed displays a striking pattern of rounded holes and grooves called the Stone Sea, sculpted by countless years of flowing water. This textured surface shows visitors exactly how persistent water erosion shapes even the hardest rock.