Refine your search for walks in Eau Noire (rivière) - Belgique    
Eau Noire (rivière) - Belgique walks
                
                Nismes and its geological phenomena            
            
        
                Over millions of years, the action of water has carved huge chasms up to 20 metres deep into the limestone. These natural chasms are called "Fondrys". In Belgium, they are only found in the Viroin region. Discover geological curiosities and viewpoints. Explore beautiful landscapes combining rocks, rivers and limestone grasslands where numerous orchids appear in spring.