Magma is liquid or semi-liquid hot rock. Depending on its chemical composition, Magma can reach over 1000 degrees Celsius. Not much is really known about magma, which is why the establishment of the world's first, open-access research centre with physical access to a magma chamber only 2km underground is pretty exciting. The centre hopes to better understand magma dynamics, which may help predict volcanic behaviour. It is also keen to explore ways of tapping into the enormous geothermal energy potential of magma.
https://www.msn.com/en-us/weather/topstories/journey-to-the-centre-of-earth-experts-to-drill-into-a-magma-chamber/ar-AA1msDEH