During our stay at FID conference in San Jose, Costa Rica, we made a one day trip 2 hours outside of the capital to Irazu Volcano National Park.
Irazú Volcano National Park
Irazu Volcano is an active one, as well as it is the highest of all active volcanoes in Costa Rica (3,432 m). The latest eruption lasted only 1 day, and occurred on December 8, 1994. During the clear day it is possible to see both Atlantic and Pacific oceans all the way from the summit.
On the other hand, there's another volcano very close to Irazu, called Turrialba. And that one is quite active as well. It erupted the day we have arrived and entire San Jose was covered in ashes. The next day a lot of flights arriving to the capital were cancelled. Visitors used to be able to hike down into the main crater, but increased gaseous activity has caused the time at the summit to be limited to no more than fifteen minutes.
The day after eruption, early in the morning we drove to the Irazu Volcano national park. The moment we reached the summit Turrialba volcano had erupted again right in front of our eyes. I have to say it was one of the most impressive nature images I have seen in my life. The size of the "mushroom" full of volcanic ashes was massive. Surprisingly eruption happened in complete silence, I always imagined an explosion-like sound accompanying it.