A pair of 17-m gamma-ray telescopes at the Roque de los Muchachos Observatory, Canary Islands. They detect the Cerenkov radiation produced when gamma rays strike the Earth’s atmosphere. The MAGIC telescopes are owned and operated by a consortium of institutions from Germany, Italy, Spain, Switzerland, Bulgaria, Croatia, Finland, Poland, India, and Japan. MAGIC-I began operation in 2004 and MAGIC-II in 2009.

https://wwwmagic.mpp.mpg.de/ Official telescopes website.