A Medieval Canyon Ending at the World's Tallest Bridge

The Tarn has cut a 50 km trench up to 500 meters deep between two vast limestone plateaus, the Causse Méjean and the Causse de Sauveterre, and a single riverside road threads the bottom of it past villages that have never outgrown the Middle Ages. This is France's other great canyon drive, the green and intimate counterpart to the Verdon's turquoise drama: stone hamlets reachable only by bridge or boat, flat-bottomed barques slipping through narrows where the walls close to a corridor, and griffon vultures wheeling off the rims, restored to these skies after extinction here. The whole landscape belongs to the UNESCO-listed Causses and Cévennes, three thousand years of shepherd country, and its plateaus hide an underground bonus in Aven Armand's forest of giant stalagmites. Then comes the twist no other canyon drive can offer: the route emerges at Millau, where the valley is crossed by the tallest bridge on Earth. The Millau Viaduct, opened in 2004 by engineer Michel Virlogeux and architect Norman Foster, carries the A75 motorway 270 meters above the Tarn on piers whose tallest mast tops 336 meters, higher than the Eiffel Tower, a structure so graceful it turned an engineering project into a pilgrimage. Medieval stone at the start, 21st-century steel at the finish, one river the whole way.

Key Stops

Florac and Ispagnac. The gateway: Florac sits at the Cévennes National Park's edge, and Ispagnac's orchards mark the canyon mouth where the D907bis commits to the river. Fuel and provisions here; the gorge itself offers charm, not services.

Sainte-Enimie. The canyon's medieval capital and one of France's official most-beautiful villages: cobbled lanes coiling up from the river, a hermitage in the cliff, and the legend of the Merovingian princess Énimie, cured of leprosy in the Burle spring and founder of the monastery that shaped the village. Park in the signed lots and walk in.

Saint-Chély-du-Tarn. A hamlet across a single arched bridge, wedged into its own cirque, with a spring cascading straight into the Tarn beside stone houses. Two minutes off the road, several centuries away.

La Malène and Les Détroits. The essential boat trip: from La Malène, local boatmen run flat-bottomed barques downstream through Les Détroits, the narrows where the walls squeeze to their tightest and tallest and the road cannot follow. Book ahead and take the morning run for the light on the water.

Pas de Soucy and Les Vignes. A prehistoric rockfall has buried the river under a chaos of giant boulders here, the Tarn grumbling somewhere beneath; viewpoints look over the jumble (heed the no-swimming warnings). Les Vignes below is the gorge's little canoe-and-beach hub.

Point Sublime. A hairpin detour climbs to the Causse de Sauveterre rim for the canyon's signature panorama: the Cirque des Baumes bending 400 meters below, the river a green ribbon between silver cliffs. The name overpromises nothing.

Le Rozier and Peyreleau. Twin villages face each other where the Jonte meets the Tarn, stacked beneath the rock spire of Capluc. This is the hiking hub: the vertiginous corniche trails of the Causse Méjean start here for experienced walkers.

The Gorges de la Jonte and the vultures. A short leg up the sister canyon reaches the Belvédère des Vautours near Le Truel, where griffon vultures, reintroduced from 1981 after being wiped out, now breed by the hundreds on the cliffs; black and Egyptian vultures have followed. Midday thermals fill the sky with three-meter wingspans, and the visitor center's cameras watch the nests live.

The causse caves and stone labyrinths. Up on the plateaus, choose your wonder: Aven Armand, a single vast chamber holding a forest of four hundred stalagmites including one of the tallest known on Earth at around 30 meters, or the Chaos de Montpellier-le-Vieux, a natural "ruined city" of dolomite towers you wander like streets. The pink-hued Dargilan cave is the quieter alternative.

Millau. Back on the Tarn, a warm southern town beneath the plateaus, historically France's glove-making capital (the museum tells it) and now its outdoor-sports capital, with paragliders spiraling off the causse edges most fair days.

The Millau Viaduct. The finale in three acts: see it from below on the valley roads, where the piers stride across the sky; learn it at the visitor area beneath the deck; then drive it on the A75, a levitating minute among the clouds. The motorway rest-area viewpoint north of the bridge gives the classic full-span photograph, best in morning light or when autumn fog fills the valley and the deck floats on cloud.

Driving Tips

Drive the gorge downstream and early. The D907bis is narrow, walled, and shared with tour coaches in season; pinch points force negotiation, and mornings belong to the light and the locals. Following the river's flow from Ispagnac to Le Rozier puts the drive's rhythm in the right order and the boat trip at mid-morning.

Book the barques and mind the water calendar. The La Malène boat trips fill in season, and the Tarn runs fullest in spring and early summer; by late August canoes scrape and boat sections shorten. Canoe rentals line the gorge (Ispagnac to Sainte-Enimie and around La Malène are the classic paddles).

Time the vultures for thermals. Late morning to mid-afternoon fills the Jonte's skies; binoculars turn specks into giants, and the belvedere's live nest cameras reward patience.

Come shoulder-season if you can. May, June, and September give warm rock, running water, and an empty road; July and August bring canoe armadas and coach traffic to a road with little room for either. Winter is hauntingly quiet, but gorge services close and shaded bends ice.

Walk at least one rim. Point Sublime by car is splendid; the Roc des Hourtous or the Capluc corniches on foot recalibrate the whole canyon. Vertigo-prone walkers should choose Point Sublime.

For more information visit: Explore Millau (Official Tourist Office)