This striking satellite photo shows a barren Mars-like volcano lurking in the heart of the Costa Rican rainforest. The alien landscape contains a super-acidic lake that is a "paradise" for extreme ...

Costa Rica’s Poás Volcano has been putting on a fiery show, with its crater glowing red from burning sulfur and molten rocks. Scientists from the Volcanological and Seismological Observatory of Costa ...

Mouth A of Costa Rica’s Poás Volcano continues to release gases so hot that incandescence is visible even during the day—a rare phenomenon not previously documented, according to the Volcanological ...