Bart got a good shot of the last vent to erupt on El Teide around 1750 AD: Driving through the black lava fields:
A mix of lava beds and other 'volcanic hills' (for lack of the technical terms ?):
We thought El Teide was cool - has the classic cone shape. Looks different than the Hawaiian volcanoes.
There is a cable car that you can take from a base station nearly to the top. There is a hike up to the top of the cone as well but requires a permit of which they only issue so many per day. We opted not to take the cable car up. One, we ride a lot of cable cars up mountains - not a novelty; Two, it was expensive and the haze/clouds didn't make for good view - saved some money; and Three, altitude. We were staying near sea level and had already driven to 2,000 m in the span of hour - on windy roads. Rachel was not feeling well and honestly, I was feeling it a bit myself. The thought of taking a cable ride up another 15oo m was not appealing.
When we are in the mountains, we usually start at 1500 m or so and go up and down in the course of time so we have time to acclimatize. 0 - 3500/3800 m in under 2 hours didn't seem wise. While I'm lecturing, those with small children really, really need to be careful about taking their children to high altitudes if they are not used to it/acclimatized. It can be dangerous and many people aren't aware of it.
We thought El Teide was cool - has the classic cone shape. Looks different than the Hawaiian volcanoes.