This French Protestant chapel is easy to miss seeing how it is located at the very end of Argentiere at the border with the forest. It is in quite a hidden and secluded area. The chapel is made out of dark wood making it even more hidden from plain sight. 

There is an excellent website in French that describes much of the cultural history of the Chamonix valley and they have an interesting page for this chapel in Argentiere. You can read the full page in French here. 

In summary: Raoul Allier was a professor of philosophy in Paris and he used to spend many holidays in Argentiere. In 1914, his son Roger went to war and died in the war. Grief stricken, he started spending more time in Argentiere and met often with the locals and together they came up with the idea for building the chapel. The chapel was inaugurated in 1920 with Raoul Allier as its first preacher. During the Nazi occupation the nearby built presbetery will become a hiding place for Jewish families fleeig to Switzerland. All in all a pretty interesting history and worth thinking about when passing it by on your way to the woods near Argentiere.