I'm planning a visit to Mont-Cenis in Haute Maurienne Vanoise. Could you tell me about the free natural attractions available, which historical military fort is recommended for an easy visit, and the approximate time it takes to walk around the Mont-Cenis lake?
Navigate to haute-maurienne-vanoise.com. Accept any cookie policies if present. Open the main menu. Click on 'Découvrir la Haute Maurienne Vanoise' (Discover Haute Maurienne Vanoise). Click on 'Les incontournables' (The essentials/must-sees). Click on 'Le Mont-Cenis'. Identify the name of the free natural attraction. Identify the specific historical military fort mentioned as easy to visit. Find the approximate walking time for touring the Mont-Cenis lake. Synthesize the names of the free natural attraction, the easy-to-visit fort, and the lake walking time.
The agent successfully navigates to the 'Le Mont-Cenis' page. The agent states that the free natural attraction is the 'Jardin Alpin' (Alpine Garden). The agent states that the fort mentioned as easy to visit is the 'fort de Ronce'. The agent states that it takes approximately 5 hours to walk around the Mont-Cenis lake. The agent provides a concise answer combining all three pieces of information.