https://www.scientificamerican.com/article/legendary-arecibo-telescope-will-close-forever-and-scientists-are-reeling/

One of astronomy’s most renowned telescopes—the 305-metre-wide radio telescope at Arecibo, Puerto Rico—is permanently closing. Engineers cannot find a safe way to repair it after two cables supporting the structure suddenly and catastrophically broke, one in August and one in early November.

It is the end of one of the most iconic and scientifically productive telescopes in the history of astronomy—and scientists are mourning its loss.