The Salt de Robert is a beautiful 30 metre waterfall from where the River Sénia originates. It is found between the town of Fredes and the Ulldecona reservoir, some 1,020 metres high, at the ravine with the same name. We can access this emblematic spot in Tinença from Fredes, from the Portell de l'Inferno or via the PR-11 which leaves from the Ulldecona reservoir.