Question: what is the most dangerous volcano you have been to

David Pyle answered on 23 Mar 2011:

Probably Lascar in Chile, as it is not monitored and not well studied, but has a habit of small and unexpected explosions. There was an explosion three days before we climbed, but we decided that the safest time to go up was straight after – and it was fine! Mostly I don’t work on volcanoes which are erupting dangerously.