Note: always stay 2 additional days at a location than you were originally planning and don't plan anything for that 2 days. So whatever you were unaware of, but about learn during your stay, you can check out on that 2 days.
Unfortunately we didn't do this with our Canary Islands visit, but even though we were running a little tight on time, the volcano route is not something you leave out. We drove along on the road that runs more or less parallel with the route and stopped at a few locations to take a better look; this is one of them.
(Oh, by the way: this entry was written by Peter Molnar, and originally posted on petermolnar dot net.)
