Not far from Petropavlovsk-Kamchatsky there is a Mutnovsky geothermal power plant, which is the biggest of its kind in Russia.
The geothermal power plant includes facilities with lots of pipes around. Believe it or not, in winter everything here is snowed under.
The operation scheme is quite simple. They pump water deep underground through specially drilled-in holes. Then the water reaches naturally heated layers of the Earth crust and percolating through hot granite, keeps getting hot until it evaporates. After that, the water goes back up through another parallel hole.
Then the hot water goes to the power plant heat exchanger, where its energy is translated into power.
Geothermal power plants are renewable energy sources with no emissions. However, they are so rarely used around the world.
This is a sulfuric acid sedimentation tank.