Odeillo solar furnace

The Odeillo solar furnace is the world's largest solar furnace. It is situated in Font-Romeu-Odeillo-Via, in the department of Pyrénées-Orientales, in the south of France. It is 48 metres high and 54 metres wide, and includes 63 heliostats. It was built between 1962 and 1968, started operating in 1969, and has a power of one megawatt.

It serves as a science research site studying materials at very high temperatures.

Source: Wikipedia