Deba

Deba is a seafaring town on the western edge of the Gipuzkoa coast, at the mouth of the river that shares its name. It belongs to the Debabarrena district and, together with Mutriku and Zumaia, forms part of the UNESCO Global Geopark of the Basque Coast, one of the most significant protected designations along the Cantabrian shoreline.

The coastal strip is defined by flysch formations — layers of hard and soft rock carved by centuries of marine erosion into vast, rib-like structures that extend hundreds of metres into the sea — most visible at Mendata and Sakoneta. This entire coastline holds protected biotope status. The beaches of Santiago and Lapari lie within the town itself, flanked by cliffs, coves and viewpoints overlooking the Bay of Biscay.

The interior of the municipality falls largely within the Izarraitz massif, a karst landscape with more than fifty caves and prehistoric sites that document human presence going back some 200,000 years. Deba brings together coast, geology and prehistory within a compact area, with rural settlements such as Itziar and Lastur adding further depth to the territory.