Located next to the hospital, we find one of the places of greatest geological and natural interest of the Cantabrian coast: the petrified dunes.
Declared by Europe Special Conservation Zone (ZEC), these dunes are the result of thousands of years of accumulations of sedimented sand that have cemented over time.
Corresponding to the composition, the different strata are classified into three broad bands. One of them is composed of shells that date back 6000 years.
The porosity of some strata facilitated the filtration of the water for years, creating an underground aquifer that supplies Gorliz’s hospital to date.