Krafla, in the north of Iceland, is a caldera ten kilometers wide. It is basically a geological cauldron, created when the core of a volcano collapsed in the distant past. The crater Víti (it means “Hell” in Icelandic) is inside Krafla.
 
In 1724 this crater erupted but now scientists want to use the awesome power of Hell for good; so they have drilled a two-kilometre deep well into the crater to see if they can put a geothermal plant there.   A geothermal plant in Hell?  Who has the last laugh now, Satan?

Read things like "The rift bleeds magma" and other delightful prose at ScienceNordic.   I once tried to find Hell and didn't have much success.  Here's hoping they have better luck finding clean energy.

Drawing heat from hell by Arnfinn Christensen, ScienceNordic.com