Observation deck; located at the Col des Portes (just after the small chapel of Le Chazelet); from which you will have breathtaking views of the valley.
Free access

 

To be afraid it is simple: just take a step into the void and remain as suspended in the air, with several hundred meters beneath your feet. Yet not about mountaineering advanced skills, everything has been designed for safety and to bring everyone, including families, this feeling of vertigo.