Puerto Deportivo Sadamar is a marina located in the town of Castro-Urdiales, in the province of Cantabria, northern Spain. It is situated on the Bay of Biscay, just a few kilometres from the border with the Basque Country. In addition to its facilities, Puerto Deportivo Sadamar is known for its beautiful location and natural surroundings. It is located in the heart of Castro-Urdiales, a historic town that is known for its beautiful architecture, narrow streets, and lively atmosphere. The marina is also close to several beaches, including the Playa de Brazomar, which is a popular spot for swimming and sunbathing.