Les Gorges du Trient Opening hours De mai à octobre. Suggestions Gueuroz bridge The Gueuroz Bridge is a reinforced concrete arch bridge located in Vernayaz. Between 1934 and 1963, it was the highest bridge in Europe. Dinosaur footprints The footprints discovered in 1976 at Vieux-Emosson date back more than 240 million years. It is the best-known site of its kind in Europe. Terraced Vineyard Trail Follow the trail and admire Matrigny's terraced vineyards The panoramic view from the top of the Bâtiaz tower enables you to take the perfect selfie!