Platja de la Marineta Cassiana, Sandy beach in Dénia, Spain

Platja de la Marineta Cassiana is a sandy beach in Dénia stretching approximately 1 kilometer along the Mediterranean coast and measuring about 70 meters wide. The shore includes lifeguard stations, first aid facilities, adapted bathrooms for people with reduced mobility, and amphibious vehicles to assist visitors with accessibility needs.

The beach developed from a natural coastal formation next to Denia's harbor, which has functioned as a maritime gateway since ancient times through Mediterranean trade routes. Its transformation into a modern bathing beach is relatively recent, shaped by the existing port infrastructure nearby.

The beach's name comes from the Valencian 'Marineta Cassiana', used on local signs alongside the Spanish 'Marineta Casiana'. It runs from the south breakwater of Dénia's port to the Barranc de l'Emboixar, and its Blue Flag status is displayed on the shore. The urban setting means bathers share the water with port traffic just to the north.

The beach offers access through several entry points along the shore, with parking and shower facilities at various locations. It is best visited early in the morning or late afternoon when it is less crowded and the sun becomes less intense.

The beach runs 1,016 metres from the south breakwater of Dénia's port to the Barranc de l'Emboixar, with a width of 70 metres. It holds the Blue Flag distinction, and its name appears as Marineta Casiana in Spanish and Marineta Cassiana in Valencian.