This 7.5 km route boasts a rich heritage, including numerous historical remains and the old Tacot route.
From the Ternin valley to the wooded hills above, Alligny boasts a rich heritage, including numerous historical remains and the old Tacot road. An ancient stele, the "Written Stone", is a reminder that this ancient village existed in Gallo-Roman times.
The castle, which can be seen from the centre of the village, dates back to the Middle Ages. It was remodelled in the 17th century.
It probably replaced other strongholds such as La Crémaine and the Tour d'Ocle, of which a few remains remain. Under the Ancien Régime, Alligny was the seat of an important seigneury, one of whose barons, Pierre Quarré d'Alligny, was elevated to the rank of count by Louis XIV in 1676.
The church dates back to the 12th century and features a 16th-century painted wooden piétà and an interior tympanum in repoussé copper by Marc Hénard.