The chapel extends via several galleries and tunnels, including one that leads to a well dating back to Roman times. There are signs in Chinon indicating the walking route and it is a good uphill hike. If you are going from the fortress, it is about a 20-minute walk but the views of Chinon are excellent. Check ahead of visiting whether the Chapelle is open, (it is closed over winter) but even if it’s not, it’s a lovely place to walk to and see the town from.