I’ve been to a couple of highly volcanically active areas in Iceland (such as Námafjall). I haven’t actually been to a proper volcano though it’s something I’d like to do.
The place I managed to recover microbes from was a fumerole (https://en.wikipedia.org/wiki/Fumarole) which is basically a mini volcano. They are super hot (they can be several hundred degrees centigrade!) and also really acidic (strong enough to dissolve rock!). Most living things would probably not be able to survive near them, let alone in them!
I’m very lucky as I get to go to volcanoes all the time! I have worked on erupting volcanoes in Hawaii and in Ecuador. I’ve also visited Mt Etna when it was erupting for a holiday. I also visit volcanoes that haven’t erupted for a hundred years like Tenerife, or thousands of years like Pantelleria in Italy, or even millions of years like the extinct volcanoes in the Lake District or Snowdon in Wales.
In Iceland, I didn’t see a volcano erupting, but I did see a geyser erupting! This is where water gets heated underground and turns to steam to it comes shooting out of the ground like a fountain. You can watch my video of that here: https://www.youtube.com/watch?v=_aYk1Duedwk
You also get geysers in Yellowstone in the USA, but my favourite thing to see there were the little mud volcanoes. Here, the water and mud gets heated underground, so the mud boils! https://www.youtube.com/watch?v=aAFKTAyeBSU
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