These ‘High Fens’ constitute Belgium's largest nationally protected reserve, an environmentally unique upland plateau of swampy heath and sphagnum peat bogs surrounded by considerable stands of woodland. The region is often wet, misty and shrouded in low cloud. But if you’re suitably prepared this can add to its mesmerising quality. The area is criss-crossed with trails for bracing day hikes and cross-country skiing routes. There are four main trailheads on the N676, each around 1.5km apart. Three of them have restaurants, seasonal ski-hire facilities and some limited information on walking routes.