Unique setting of  inland Brittany to have received the label “Grand Site”, the lower valley of the Oust river boasts a surprising variety of landscapes. Rocky cliffs overhanging the river, quiet marshland, woods and forests rub shoulders as you go along the trails. In sections where it is not stabilized in the hard shoulder of the canal from Nantes to Brest, designed and built under Napoléon I , the Oust river has chiselled imposing features on its way, like transverse valleys, sort of gorges framed by the cliffs, unusual for the region. The île aux Pies (the magpie island), set between Bains-sur-Oust and Saint Vincent-sur-Oust, is the most spectacular expression of this phenomena, with rocky peaks towering at 50 meters heights. It is not only a paradise for rock climbing, with a range of tracks for different abilities overhanging the river, but it is also an ideal spot for hiking and cycling because of a network of outmarked trails. Naturally going hand in hand with a well-preserved nature, the wildlife abounds in these humid and green landscapes. Marshland is a special home to a wide range of species: you can find yourself face to face with a grey heron, observe the teals or even kingfishers. The flora reveals just as abundant wealth, with luxuriant maritime pine and Wisteria. The Glenan mortar, well-known by anglers, is an ideal refuge for all kinds of fish species, and  the local inhabitants owe their nick-name, “the yellow bellies”, to the eels.
Over the last few years, facilities have been set up and thought out to fit perfectly into the environment as well as suit the visitor's activities: landing stages, canoe stairs and picnic areas have been built in wood or stone, in order to preserve the natural aspect of the setting. Busy commercial traffic on the Oust came to an end  in the 1920s , and the boats deserted the riverbed of the Oust for a long period. But the development of river-tourism has put new light on it, and boats are anew floating along the  riverside. Today, efforts are made to encourage navigation, and the houseboats find landing stages in different places along the banks: Bains-sur-Oust, Saint Vincent-sur-Oust, Peillac,...
Such an enchanting setting is bound to appeal to story-tellers, and trails based on various themes are a playful way to discover a great number of legends and the secrets of the country.
Historical events are supposed to have happened here: in Bains-sur-Oust, a statue stands for the  memory of Nominoë, who fought back the troops of Charles-le-Chauve, king of France, to then unifie Brittany and finally win its independence. The battlefield is situated in Ballon, in the east of Bains-sur-Oust.