The Arenal Volcano in Costa Rica is not just the country's most active volcano. It is also a treasure trove of fun activities. It's a great place to get some adventure – the sight of the volcano in action is a great place to start. Here, you can get a load of molten lava and hot rocks being spewed out of its mouth. The best time to see it is at night when the lava and rocks glow in the darkness ...
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