There are lots of good viewpoints on La Palma, but one of my favourites is Los Andennes, where you get an amazing view into the Caldera.
The viewpoint is between km 32 and 33 on the road from Santa Cruz to the Roque de los Muchachos, and there’s parking for several cars. Most days of the year, you’re well above the clouds, often looking down on them. Soemtimes the Caldera is full of cloud, which is impressive in its way, but not nearly as good as the times when the crater is full of fluffy little clouds and you can see between them all the way to the bottom, some 4,000 ft below.
To your right, you can see Robert’s Wall which has a legend attached to it.