The lake in the Irazu crater is probably dry now, that one and his brother Turrialba have been acting up lately, as a result, you can no longer get right up to the crater of the Turrialba , who was extinct not that long ago , I have pictures of me standing right in the crater of it
Now there is a real time camera in the Turrialba cause........its best to keep an eye on it
Totally cloudy as I type this
http://www.ovsicori.una.ac.cr/vulcan...ideoturri.html but this is a picture taken by a good friend of mine (he has lots of cool pics in there)
http://www.flickr.com/photos/robertowachong/3926670255/
All in all, the Arenal (and the Rincon de la Vieja) are the most impressive ones