Saint-Nazaire-En-Royans brings together an aqueduct above the Bourne, a cave with an archaeological and geological history, trails with far-reaching views, and a narrated river cruise. This gives you a choice of different ways to plan your visit: architecture and cave, hiking and views, or a cruise on the Isère and Bourne.
Aqueduct and Grotte de Thaïs
The Aqueduc de Saint-Nazaire-en-Royans is laid out as a walking path above the Bourne and has 17 arches. A walk lets you take in both its architectural form and its relationship to the river. The site combines a striking structure with a concrete opportunity to explore it on foot.
Grotte de Thaïs is in the heart of Saint-Nazaire-En-Royans. Two camp sites and artistic objects attest to the presence of the Magdalenian and Azilian cultures over more than 3,000 years. Geology has also shaped the cave: a river resurgence formed its labyrinthine passages. Other features include concretions thousands of years old, with red and black colouring.
The cave thus brings archaeological traces and geological formations together, without requiring you to treat them as the same thing: the camp sites and objects offer clues to early cultures, while the passages and concretions highlight how the cave was formed. Together with the aqueduct, they offer a choice between architectural history, archaeology and natural formations.
Views and trails
The moderately difficult circular route to Belvédère de Vanille is 4.5 kilometres long. It starts and ends at Parking Aqueduc in Saint-Nazaire-en-Royans. From the viewpoint, you can see the Aqueduc and the Isère and Bourne valleys; in the distance are the Vercors massif’s three major gorges. Visibility depends on the weather. As trail conditions and markings, as well as parking options, can change, check them before setting out.
Les coteaux du Royans offers a different landscape. The route crosses slopes and walnut groves, then follows a scenic balcony road with views of the Isère and Bourne valleys. The descent reaches the lake and the red-ochre rocks of Saint-Nazaire-En-Royans. The route thus leads from cultivated slopes to valley views and on to the landscape features mentioned above.
The Au Fil de la Bourne route starts at the striking Aqueduc de Saint-Nazaire-en-Royans and follows the Bourne canal. Unlike the Belvédère route, whose circular format, length and difficulty level are specified, the feature highlighted here is its course along the canal. The three routes therefore offer different focuses: views and a circular walk, slopes and walnut groves, or the Bourne canal.
River cruise and nature
The Bateau à Roue offers narrated cruises on the Isère and Bourne between Saint-Nazaire-En-Royans and the village of La Sône. Schedules can vary, so check current departure times before making plans. The waterways include marshes and reed beds that provide habitat for waterbirds. The cruise combines commentary on the rivers with a landscape that includes wetlands and reeds.
The type of experience is a practical distinction when choosing between the options: the Belvédère focuses on a moderately difficult circular route of a specified length, while the Bateau à Roue offers a narrated cruise with a variable schedule. Views from Belvédère are also weather-dependent. This lets you plan around walking, a river cruise or the views, without assuming the same time or itinerary for every option.
Espace Royans et Vercors
Espace Royans et Vercors offers a multisensory exploration of the area through sight, hearing, touch and smell. The tour is accessible to people with all types of disabilities; check the current access conditions again before your trip. Aqueduc - Espace Royans & Vercors also has a panoramic lift, an elevated walkway, orientation panels, information panels and talking terminals. Check the facilities’ current operating details before your visit, too.
The exhibition at Aqueduc - Espace Royans & Vercors covers the Vercors Regional Natural Park, local heritage, historic routes, and the wildlife and plant life of the Vercors. This adds regional themes to the structures and archaeological finds. If you would like to explore culture and landscape in different ways, you can compare these exhibits with the trail and river options: the tour engages several senses and offers interpretation, the trails focus on views and changing landscapes, and the cruise offers commentary along the way.
Discover more destinations: Saulce-Sur-Rhône, Bouchet, Salles-Sous-Bois, Chanos-Curson, Molières-Glandaz, La Roche-De-Glun, Cliousclat, Montjoux.
For the broader travel overview: Drôme.
