Inactive Volcanoes You Can Visit

By Marisa Lascala - 2014-03-19T17:35:41Z

Mauricio Abreu/JAI/Corbis

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Furna do Enxofre

Graciaso, Azores Islands

Like Thrihnukagigur, you can also hike in and around the ruins of a volcano in Furna do Enxofre, though the volcano isn't nearly as preserved. Still, once you descend the volcanic staircase, you can see an immense crater lake protected by a dome-shaped roof of a lava cave. There are two openings in the cave that let sunlight in, casting a glow on the rock formations at certain times of the day. Just watch out for the smell—"Furna do Enxofre" translates into "Sulphur Cave."

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