The Cantabrian coast is a great unknown full of treasures to discover. Its steep walls that fall into the sea make it difficult to navigate its terrain, but when you make the effort you discover magnificent viewpoints, caves and natural pools like this one, which have been nicknamed the 'Blue Eye of Cantabria'. Close to Castro-Urdiales, this intimate corner away from the usual beaches is the perfect getaway to the north for Easter 2026.
This beautiful natural pool is located in the small town of Islares, on what is known as Arenillas beach. Here there was an old port from the 1950s, which fell into disuse and was flooded by the sea. With this, this very special pool was formed, with a rock breakwater into which the waves cannot enter, offering calm and crystalline waters even in the fury of the Cantabrian Sea.
To visit it, it is important to know the tides well. At low tide, Las Arenillas beach appears, a sandy cove surrounded by rocks. However, when the tide rises, the water advances over the stones, flooding the pool and filling it. At an intermediate point between low tide and high tide is when this pool is perfect for a dip, without having emptied and without strong waves coming over it.
At sunset, when the sun sets on the sea horizon, this pool becomes a mirror that reflects the cliffs and clouds, in a beautiful orange that ends the day in the most beautiful way possible. This getaway is one of those that makes you return to your routine with your batteries charged.
