They are ferocious when on the attack and unpredictable in nature - but absolutely stunning when viewed from the inside.
For these are the spectacular images taken by photographer Lurie Belegurschi, who descended into the heart of Thrihnukagigur volcano, near Reykjavik in Iceland, to show the extraordinary beauty of the magma chambers buried deep within the dormant volcano.
Perhaps the explorer felt secure as he descended to 120 metres - the equivalent of three Statues of Liberty piled one on top of the other - because it has been 4,000 years since the volcano last erupted.
But as he descended in a basket attached to a crane, the old mantra must have run through his head: It's not a question of if, it's when...
Descending to the magma: Look at the bottom of the picture, and you can see fearless explorer Iurie Belegurschi, 120 metres into the heart of the volcano
The extraordinary Thrihnukagigur is situated southeast of Reykjavik in Iceland hasn't gone off for 4,000 years - which is lucky for Ieurie
Descending into the unknown: Sunlight can be glimpsed through the top of the chamber - the exit route for any explosive magma
On the outskirts: The Thrihnukagigur volcano, surrounded by cooled lava fields, as it looks from a (hopefully) safe distance
On top of the world... I mean - the bottom of the volcano: Iurie stands in front of the wonderfully-coloured rocks