Beginning at the aquarium, the Paseo Nuevo encircles the entire Monte Urgull, which is crowned by the Castillo de la Mota, a formidable 12th-century fortress, and a statue representing the Sacred Heart.
The scenic promenade of Paseo Nuevo affords sensational views of the rocky shoreline extending to the Urumea River.
Beyond the river's Puente Zurriola (bridge), a seafront promenade runs east towards Monte Ulía. Beyond the Zurriola Beach, the expansive Parque de Ulía is a beautiful natural space that's ideal for hiking and picnics.
If you don't feel like carrying your lunch, the Mirador de Ulía restaurant provides panoramic views of the city, beach, and water from its perch on the slopes of Monte Ulía.