Arenal Volcano, Costa Rica
This is a view towards Arenal from the northwest, and you can see that it presents a very different face than from the small town on the south. At the summit is a series of small explosion craters and slow-moving lava flows that almost constantly send large rocks tumbling down this side of the mountain (you can see the dusty trails of a few of them). About a year after this photo was taken, pyroclastic flows rushed down this flank and devastated the area in the foreground.
Information Source:
Photo and caption by Scott Rowland
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