The coastline along Castellón province presents a variety of different landscapes. Sandy beaches alternate with shingle in Cabanes, Moncofa and Torreblanca, and two tall cliff fronts also interrupt the normally flat coast. The first is between Benicàssim and Oropesa. The second is the magnificently preserved Sierra d'Irta (between Alcalà de Xivert and Peñíscola). Also running along the coast are wetlands providing important nature habitats. The Peñíscola marsh, the mouth of the Millars river (Vila-real), the Estany de Nules (lake), the Chilches-Almenara marsh and others, form an important eco-system with unique vegetation and a rich array of small animals, autochthonous fish like the fartet (Aphanius iberus) and samaruc(Valencia hispanica) and a wide array of nesting and migratory birds.