The Observatoire Sainte-Cécile stands at the western edge of the Ville d'Hiver, a thin iron tower that offers one of the best views in Arcachon over the bay and the town below. The tower is modest in scale compared to Eiffel's later works, but the engineering — slender wrought-iron legs spreading to a small viewing platform — already shows the approach that would characterise his more famous structures.
The climb to the top is not for the faint-hearted: the stairs are steep and the tower sways slightly in the wind. But the view from the platform on a clear day takes in the whole sweep of the Arcachon bay, the distant Dune du Pilat to the south, and the spread of pine forest on all sides. The tower sits in a small park; the surrounding neighbourhood is pleasant to explore on foot.