lesse river and walzin castle on rocky hill protruding from lush green trees

aerial view ancient architecture ardennes building castle chateau cloudy countryside dinant environment europe exterior forest fort fortification fortress gothic green heritage hiking hill historic history land landmark landscape medieval mountain nature old outdoor palace private river riverside rock spring summer tourism tourist tower travel tree valley vintage wall water woods lesse walzin rocky protruding lush trees background stone walls towers stream overflowing sunny day namur province wallonia belgium