Start near the Mosan Gothic-style Church of Saint-Martin, which has been listed since 1970. It boasts a bulbous bell tower and a 15th-century tabernacle. Follow a narrow path that provides access to the trail to ‘Gros Rouloy’. This itinerary is popular for its humid grasslands. Part of the Sambre river is ‘Natura 2000’-listed, due to the exceptional flora and fauna found there. Tarpans and a Shetland pony help to maintain the reserve without mechanical assistance. The wetlands are a site used by aquatic birds, as well as the northern crested newt, for breeding, migration and overwintering. Small white and yellow water lilies add a pretty splash of colour to the landscape.

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