The Azores are volcanic islands and are part of the European Geopark network certified by UNESCO. In Terceira, you have the opportunity to visit and explore some of the most amazing geosites of the Azores, such as the crumbling caldrons and its beautiful lakes, observe the volcanic crests and formations left by the eruptions. Discover the underworld descending into volcanic caves or observe the fumaroles. Let us recommend the best and unforgettable places!