If you want to see the Bruyant Gorges in all their glory, the Bec de l'Aigle is the place to go. It can be a good hiking destination from Lans-en-Vercors.
The Gorges du Nan are among the most beautiful gorges in the Vercors. The forest, the Nan River and the many waterfalls that line the route make these gorges a real pleasure to explore.