We hope you enjoy these dramatic images of day and night eruptions, steam vents and lava flows of Costa Rica's most famous active volcano. Arenal Volcano towers over the tropical countryside at the edge of Lake Arenal and regularly demonstrates the power of nature with its eruptions of ash and red-hot molten rock.

Click on these thumbnails of Costa Rica's Arenal Volcano to view full-size images.
Arenal Volcano night eruption under the clouds in Costa RicaMassive nighttime eruption of Arenal Volcano, under the clouds in Costa RicaArenal Volcano nighttime eruption under the clouds in Costa Rica
Three shot sequence of an eruption		Steam escapes the summit of Arenal Volcano, Costa Rica
115k		Towering ash plume over Arenal Volcano, Costa Rica
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Arenal Volcano erupts through the clouds
37k		Arenal Volcano erupts on a clear night in Costa Rica
63k		Close-up view of steam vent on the skirt of Arenal Volcano, Costa Rica
60k		Brave explorers climb loose lava on Arenal Volcano
56k		Arenal Volcano provides natural saunas amid its porous lava rock
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Time exposed night shot of Arenal Volcano erupting, with streaking stars
38k		Night time exposure of glowing lava flow on the north side of Arenal Volcano, Costa Rica
20k		Massive steam vent on a newer lava flow on Arenal Volcano, Costa Rica
87		Looking up an old lava flow on Arenal Volcano, Costa Rica
87k		Many vents emit steam in this view from northwest
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View of Arenal Volcano from pasture near La Fortuna, Costa Rica
41k		 Looking down toward Arenal Lake from a major steam vent
53k		 Looking up a washout next to an old lava flow
58k		 Arenal Lake from up the side of Arenal Volcano
52k		 Arenal Volcano displays a small eruption of ash and molten rock
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Molten rock into the air on the peak of Arenal Volcano, Costa Rica
23k		 Arenal Volcano, Costa Rica, viewed from northeast
42k		 New lava flow on Arenal Volcano, viewed from Tabacon Resort, Costa Rica, May 5, 1998
36k		 ARENAL Volcano viewed from Tabacon Resort after the May 5, 1998 eruption
47k		 ARENAL Volcano seen from the lake side, after May 5, 1998 eruption
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