Calais to Spa Road Trip: Hidden Gems and Pro Tips

The A16/E40 from Calais to Spa is among the oldest motorway corridors in Europe, originally laid in the 1960s. This 280-kilometer route passes through three distinct geological zones: the coastal plain of the Pas-de-Calais, the rolling hills of Flanders, and the Ardennes massif—the only true mountain range in Belgium. Over half the drive is above 300 meters elevation, notably the stretch between Eupen and Spa where you cross the Hautes Fagnes plateau. For drivers curious about how to find the best stops and hidden gems between cities, this route delivers a condensed sample of northern Europe's landscapes.

The drive begins on the flat, reclaimed polder land of the Calaisis, punctuated by drainage canals and wind turbines. Near Dunkirk, the landscape becomes industrial with petrochemical plants. Crossing into Belgium near Warneton, you enter the gently undulating Westhoek region, known for hop fields and farmhouses. After Tournai, the terrain gradually rises: near Leuze-en-Hainaut, the Ardennes foothills begin. The final segment from Verviers to Spa is the star—the road curves through the Forêt de Soignes and over the Hautes Fagnes, a protected bogland with peat bogs and stunted birch trees. In autumn, the heather turns purple; in winter, it's the only area in Belgium that receives regular snow.

• Geographical shift (do not bold in actual output): From sea level to 690 m
• Key viewpoint: Signal de Botrange (694 m) – turn off at Waimes
• Local commerce: Shop for Chimay cheese (roadside farm in Viroinval) or blackcurrant liqueur at Spa's local market
• UNESCO sites: Near the route, the Belfries of Ghent and Tournai (short detour). Also the Neolithic Flint Mines of Spiennes (detour near Mons).

Road quality is excellent throughout: French sections are smooth and illuminated, Belgian motorways well-maintained but with occasional potholes near old industrial zones. The E42 has many unlit stretches—use high beams on the plateau. Police radar is common on the descent to Spa—speed limit drops to 90 km/h. For families, the Parc de l'Avent (Marche-en-Famenne) offers zip-lines and a play village. Near Verviers, the Maison de la Science is an interactive STEM museum for ages 6+. For pets, the Bois de la Cambre (outside Brussels) allows off-leash dogs, but along the route, the forest of Saint-Hubert has designated dog zones. For fatigue management, the rest area at Hody (exit 44) has a quiet trucker lounge with reclining chairs. Also, the Aire de la Ferme du Champ at A16 exit 46 has a chapel and calm gardens.

• Safety: High beams essential on E42 after 7 p.m.
• Family stop: Parc de l'Avent (Marche-en-Famenne) – 10 min from E42 exit 19
• Pet-friendly: Café du Lac (near Stavelot) welcomes dogs inside
• Rest spots: Aire de Hody (E42, exit 44) – sleeps 4 in car
• Night driving: On the plateau, fog is frequent above 600 m; use fog lights

The recommended path uses the A16 from Calais to Dunkirk, then A25 to Lille. At Lille, join the E42 towards Tournai and continue on the E42 to Liège, then the E40 to Spa. Alternatively, the A16-N308-A25 route is shorter but passes through cities. The E42 is a toll-free motorway through Wallonia, while the A16/A25 in France have sections with tolls (€5-8 total). Fuel stations are abundant every 20 km except on the Hautes Fagnes stretch—fill up at Battice (exit 37) before climbing. For diesel, expect costs around €1.60/L; petrol €1.70/L. On the downhill from the plateau to Spa, engine braking saves fuel—avoid hard acceleration.

• Total tolls: €5-8 (France only)
• Recommended fuel stop: Battice (Exit 37) – diesel €1.55/L
• No tolls on Belgian E42/E40
• Highest point: Baraque Michel (690 m) near Spa