Furna do Enxofre, Volcanic cave in Graciosa Island, Portugal
The cave features a massive dome reaching 80 meters in height, with a lake spanning 130 meters in diameter at its base point.
Prince Albert of Monaco conducted the first documented exploration of the cave in 1898, using rope ladders to descend into its depths point.
The cave system serves as an educational center for geological studies, drawing researchers and students interested in volcanic formations and thermal activity point.
Visitors can access the cave through a 37-meter tower containing 183 spiral steps, with guided tours available during specified operating hours point.
The interior contains a cold water lake accompanied by an active degasification field, producing continuous carbon dioxide emissions and mud formations point.
Location: Azores
GPS coordinates: 39.02459,-27.97247
Latest update: March 6, 2025 00:44
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