{"id":59072,"date":"2026-10-13T20:18:53","date_gmt":"2026-10-13T20:18:53","guid":{"rendered":"https:\/\/realdreams.pt\/?post_type=to-visit&p=59072"},"modified":"2026-10-13T20:18:53","modified_gmt":"2026-10-13T20:18:53","slug":"furna-do-enxofre","status":"publish","type":"to-visit","link":"https:\/\/realdreams.pt\/fr\/attractions-to-visit\/regions-of-portugal\/azores-region\/furna-do-enxofre\/","title":{"rendered":"Furna do Enxofre"},"content":{"rendered":"

In the centre of Graciosa, inside the great caldeira of the island, the Furna do Enxofre opens in the rock: a volcanic cavern of enormous height where a lake of green water lies under a perfect dome of stone. It is one of the great natural monuments of the Azores \u2014 a place of geology in its purest form, reached by descending a spiral tower into the heart of an ancient volcano.<\/p>\n\n\n\n

The cave<\/h2>\n\n\n\n

The furna was formed by the collapse of a volcanic chamber, in the heart of the caldeira that dominates the island. Inside, the hall rises like the nave of a cathedral, with the skylight of the entrance above and the lake \u2014 fed by rain and fumaroles \u2014 in the depths; the air carries the smell of sulphur that gave the cave its name. The visit descends by a modern access tower, with a spiral staircase, to the floor of the cavern and its viewpoints over the water.<\/p>\n\n\n\n

What to see<\/h2>\n\n\n\n