The 'Fond des Vaulx' nature reserve and 'Trotti-aux-Fosses' cavity
The small, deep valley called the Fond des Vaulx with its wild, untamed character and a surface area of approximately 15 hectares (37 acres) offers us a landscape which forms quite a contrast with the expanse of the plain surrounding Marche. The valley is part of the limestone strip known as the Calestienne, which was fashioned over millions of years by the acid water seeping from the Ardennes massif in the south. Many legends are linked to this mystery-shrouded valley...
Three walks will allow you to discover, among other sights, several cavities and caverns (the Ducasse Cave, Trou du Renard 'The Fox's Hole', etc.), and a chasm called the Trotti aux Fosses (a geological oddity unique in Belgium and listed as a Subterranean Cavity of Scientific Interest), chantoirs (which are tears in the river bed) and rock faces, for example the Plate Pierre 'The Flat Stone'...
In this minute valley, a surprising variety of fauna, flora and geological forms are the joy of many a nature enthusiast.
A sheltered barbecue area and a fitness trail have been created for the enjoyment of ramblers and fitness enthusiasts alike. Rustic cows and sheep are regularly put out to graze in the valley.
