If you can't stand the heat... keep away from the volcano: Astonishing picture of scientist just metres from boiling hot lava cauldron
He looks like he's on a journey to the centre of the Earth.
But unlike the professor in Jules Verne's novel of the same name, this scientist could meet a fiery end if he goes any further.
In these stunning pictures, fearless Geoff Mackley looks like a speck of tin foil next to the 1,150C molten pit raging inside the crater of a volcano.
Scroll down to watch the abseil...

Like the surface of the sun: Getting to within just 30m of the molten lava, Geoff Mackley has become the first person ever to get so close to the centre of this volcano