What is tuff?

On the opposite bank upstream, you can observe a great balm where water seeps and benefits many mosses and ferns. You may not be able to see it from the road, but this flowing limestone water redeposits on the ground some of its elements by trapping plant and animal debris. Tuff or travertine is this fragile limestone, light and airy, always rare and located in Provence. It is essential never to trample or pick it at risk of causing irreversible damages!